^ c* ^P g~* OF THK Wtttttttoiifl of Mo Division Range Shelf Received ,j^^^ -?^'/v/ /SI MANUAL AGKICULTUKE, FOB THE SCHOOL, THE FARM, THE FIRESIDE. BY GEORGE B. < t j , Author of a " Report on the Trees and Shrubs of Massachusetts, * I ^ \ AND CHARLES L. FLINT, SECRETARY OF THE STATE BOARD OF AGRICULTURE, Author of a Treatise on " Milch Cows and Dairy Farming," and " Grasses and Forage Plants," etc., etc. BOSTON: SWAN, BREWER & TILESTON, 131 WASHINGTON STREET. 1862. [Published under the sanction of the State Board of Agriculture.] Entered according to Act of Congrcs3, in the year 1861, BY GEORGE B. EMERSON AND CUARLES L. FLINT, In the Clerk's Office of the District Court of the District of Massachusetts. The Massachusetts State Board of Agriculture, after a careful revision of the work, passed the following Resolution : — " Resolved, That this Board approve of the Manual of Agriculture, submitted by its authors, Messrs. George B. Emerson and Charles L. Flint, and recommend its publication by these gentlemen, as a work well adapted for use in the schools of Massachusetts." LETTER FROM HON. MARSHALL P. WILDER. DORCHESTER, November 22, 1861. Gentlemen, — The first demand of life is for food, and the only supply is from the products of the soil. Agriculture is, therefore, of primary importance, not only as the source from which we derive our daily bread, but as the parent of all the other great industrial pursuits. Without agriculture there can be no commerce or manufactures, no population or prosperity. Every one, of whatever vocation, is interested in its welfare, and every man, woman and child, should have some knowledge of the fundamental principles of this most useful art. To accomplish so desirable an object, and especially to implant in the minds of youth an abiding ^love for this honorable employment, the Massachusetts Board of Agriculture have caused the Manual of Agriculture for Schools to be prepared under its own supervision and direction. The task of preparing this volume was confided to Messrs. George B. Emerson and Charles L. Flint. Wor thily have the authors performed their duty, and most cordially do I recommend the "book as being admirably adapted to the use of schools, and equally valuable to the cultivators of the soil". I take great pleasure in commending it, not only to the people of Massachusetts, but to the farming community throughout our country. MARSHALL P. WILDER. Messrs. SWAN, BKEWER & TILESTON. OPINIONS OF THE PRESS. [From the Montreal Transcript.] One of the most useful books of the kind we have ever met with. [From the Ohio Farmer.] The plan of the work is excellent and the matter equal to the plan. Had wo the power we would have it taught in every school in America. [From the BarnstuMr Patriot.] It mav be safely accepted as a standard work upon all that it professes to tcarh. N\Y recommend it to all our fanners as a most useful hand-book. [From the Gazette, Montreal.] Tlir plan of the work ia admirable, and the writing has the merit of being both clear and concise. U K .. . VKK.siTV OF CALIF* ;; PREFACE. This book is intended to supply an important defect in the instruction of youth. Children should not only receive instruction in the various studies now pursued in the schools, but they should be enabled to obtain the rudiments of a correct agricultural education in the forming period of life. Many of them are destined to work upon the surface of the earth, and to use the materials of which it is formed. They are to cooperate with the great powers of nature and to be able, in many instances, to control these powers. They instinctively long to become acquainted with the materials they are to work upon, and the powers they are to work with. An agricultural education should, therefore, be commenced in childhood. Children are always interested in animals and other natural objects. There is scarcely a fact exhibited in nature which does not, at once, interest their curiosity and appeal to their imagi nation. They should, therefore, learn about the earth, the different kinds of soil, the names of the different kinds of rocks and their uses. Tell children that, in the soil, the roots of the grasses dissolve the stones, and carry particles of them up and leave them, infinitely minute but infinitely numerous, in the stem and leaves, and that these particles make the grass strong enough to stand up, and they will be interested in the information. IV PREFACE. Children should learn the appearance and properties of every common metal ; for there is no person to whom the knowledge would, in any part of life, be useless. There are seventeen, perhaps nineteen, elementary substances in all, which enter into the composition of plants and animals. These, combined, form the numberless objects which are exhibited by the vegetable and animal kingdom, and children should be taught the nature, properties and uses of these elements. We live surrounded by the air, which is composed of two invis ible gases, oxygen and nitrogen, both essential to the life of every animal and of every plant. Children do not see air, nor oxygen, nor nitrogen ; but they are just as able to understand this mixture, both ingredients of which are invisible, as they are to understand, what they often see, that salt becomes invisible in water, and steam and smoke in the air. Show them a piece of clean, bright iron, and another of rusty iron, and explain to them that it is the oxygen of the air which has combined with the iron, and converted it into rust or dirt, and they will be prepared to comprehend all that you have to teach them about the combinations of oxygen and other elements with each other. Plants feed on carbonic acid and ammonia. When children understand what these are, there is nothing you can tell them more curious and wonderful than the fact, that the wind which blows from the habitations of men carries with it these gases, offensive and poisonous to animals, but that rain dissolves and brings them down to the roots, and that plants live upon them. All these facts are perfectly intelligible to children at an age as early as that at which they are capable of learning grammar and geography. Every fact to be presented is a simple fact. There is scarcely one in natural history, or in the sciences on PREFACE. V which the knowledge of the principles of agriculture is founded, which is not as easily comprehended as any of the ideas of history. Which, for example, is easier for a child to comprehend, oxygen and its action, or civil government, nitrogen or confed eration, carbon or a league, phosphorus or the reformation? Which will a child be most likely to understand and be interested in, the little root and seed leaves of a plant just up, and the future plant rising between them, or a convocation of ambassadors to consider the Edict of Nantes, or a plenipo tentiary to protest against the Solemn League and Covenant ? So far is a knowledge of the powers which are in operation in nature, the action of heat and light, and the causes of wind and rain, with their effects upon the vegetable kingdom, from being difficult, it is that which every sensible child instinctively longs for and delights in ; and as to its being speculative, it is the only knowledge which is absolutely sure to be useful to every person who obtains it. An essential part of good education is admitted to be the dis cipline of the faculties. The faculties which come earliest into play, are suited to observe and learn the facts presented in nature. These facts and objects are, therefore, the proper, natural study of the earliest years of children. We would, therefore, gladly make a knowledge of the principles which underlie an intelligent understanding of the art of agriculture, the basis of education, especially for all those who are destined to the happy fortunes of living in the country. And who is there, that has ever lived in the country, who does not hope, some day or other, to live on his own farm or among the farms of his friends, in the midst of the things which God has made? 1* VI PREFACE. The State Board of Agriculture, strongly impressed with the importance of these views, has caused this volume to be prepared as a text-book for schools, with the hope that it may do some thing to lay the foundation of a complete agricultural education, where it may most effectually be done, in the district school. In the execution of the work, Mr. Emerson has prepared the first thirteen chapters and the twenty-first chapter, upon the Rotation of Crops, and Mr. Flint the remainder, commencing with the fourteenth chapter. Many of the more important principles embraced in the topics discussed, have been repeated in various forms and in different connections, for the purpose of impressing them more strongly upon the mind, but it is confidently hoped that this fact will not make the volume unattractive to the general reader. The authors do not lay any claim to originality. They have availed themselves of the information of scientific and practical men, and have tried to state it in a concise and attractive form, so far as the subjects treated of seemed to make it practicable to do so. BOSTON, November, 1861. N Li i> U UJV J V K!iS!TY OK CALIFORNIA. MANUAL OF AGRICULTURE. CHAPTER I. INTRODUCTION. 1. Agriculture is the art of cultivating the earth. It includes whatever is necessary for finding out the nature of the soil, clearing up the land, rendering it healthy, and preparing it for tillage, and ploughing it, and the sowing, weeding and harvesting the crops. 2. The object of agriculture should be to enrich the earth, and make it produce the largest crops, of the greatest value, at the least expense of land, time, and labor. 3. In order to attain this object, the husbandman must have capital, — that is, money, for the necessary expen ditures ; labor, or hands for the operations required ; knowledge of the best ways of working ; and intelligence, in order to direct the application of the capital and labor. 4. A complete farm ought to have woodland, pasture land, meadow or grass land, arable land, an orchard, a garden spot, and space for roads. It should have a farmer's house, a barn or stable for horses, oxen, sheep, and swine, and for crops, a tool- 2 INTRODUCTION. house, a dairy, fences, walls or hedges, and wells or springs. It would he desirahle to have a stream running through it or hy it, and to have a pond or swamp connected with or belonging to it. 5. A husbandman also wants capital to stock his farm with cattle and other animals, and to furnish it with carts, wagons, ploughs, and other tools. 6. To carry on a farm successfully, a good deal of knowledge and a high degree of intelligence are neces sary, and these are to be obtained partly by study, and partly by practice. By study the farmer should find out — 1st, the nature and mode of growth of the plants and -animals he is to have to do with ; and 2d, the nature and properties of the soil and of the atmosphere on and in which they live. Practice, or experience, is acquired by doing himself the work on a farm, under the guidance of a skilful farmer. By means of both study and experience, he may learn to avail himself of all the means of improving his farm which are in his reach, or which he can bring within his reach. 7. The farmer, indeed, should have that exact knowl edge of facts and principles, of effects and their causes, which is called Science. For example, if a farmer knows exactly what a plant is made of, and what nourishment it requires, and whether a particular soil contains the substances which will nourish that plant, and, if it do not, knows exactly what kind of manure does contain proper nourishment for the plant, that farmer has a scientific kn<>\\ Inliiv »»!' ilir phial, of the soil, and of the manure. He has the science necessary to the culture of that plant. Science is exact knowledge, obtained by SCIENCE. — USE OF EDUCATION. 3 the observation and experience of many observers, and its natural fruit is " the substitution of rational practice for unsound prejudice." 8. You see then what is the use of a scientific knowl edge of the principles of agriculture. It prepares a person for the practice of agriculture. A person who has thoroughly learned the scientific principles, will under stand, without any difficulty, the reasons for the operations of agriculture. 9. But science will not be sufficient without practice. Practice teaches a thousand things which have not got into the books. But a knowledge of scientific principles opens one's eyes to observe and see many facts which the more unenlightened laborer cannot see, and to perceive the connection between facts which to the ignorant person seem to have no connection. 10. The farmer, therefore, should have a good educa tion. For no one is more highly benefited by a good education. The farmer pursues one of the most impor tant occupations in the world. Almost all the food of civilized man is produced on the farm. The quantity and excellence of the food thus produced depend upon the skill and intelligence with which the farm is managed. Nothing can be done so well by an ignorant and careless person, as by a person of intelligence and knowledge, and there is no place where knowledge is more impor tant than it is on a farm. 11. Of the value of exact knowledge to a farmer there is abundant evidence. Such progress has been made, within a few years past, in the various arts which belong to agriculture, that the produce from the farms in many parts of Europe, particularly of England, is twice as great, on the same land, and with the same amount of 4 INTRODUCTION. labor, as it was thirty years ago. Now, the improvements which have been made on English farms may be made on American farms, by the use of the same means. 12. Those means are the application of science to the treatment of soils, manures, modes of tillage, and man agement of animals ; and improvements in the various tools and machines used in the work of farming. And no person can wisely make this application, and avail himself fully of these improvements, who is not well educated. 13. Besides, we have evidence nearer home of the value of knowledge to a farmer. The farms in New England, which have been conducted with intelligence, knowledge, forethought and economy, have, in many instances, made, out of poor men, men well to do in the world, and rich enough to command all the comforts and enjoyments of life. Many of the towns in Massa chusetts which have been always wholly devoted to agri culture, are among the most thriving towns in the State. 14. But, the question will be asked, suppose a farmer to be well educated ; will he have time to keep up his knowledge ? If a farmer have the good fortune to obtain a good education in his early years, he will have more time and stronger inducements .to keep up and add to his knowl edge, than almost any one else. One peculiar advanln^- in the occupation of a farmer is that, while it gives full exercise to the powers of the body, it leaves time, at Irnst in this country, for a very full exercise of the power's of the mind. Every operation on the farm calls into use the i;iriiicr's knowledge and intelligence ; and the long evenings of one half of the year give him ample time for reading and thought. Watching the SCIENCE. — USE OF EDUCATION. 5 nature and action of scientific principles will give a new interest and pleasure to every operation in which the farmer engages ; and his success in their application will furnish a strong motive for new acquisitions. 15. There is no doubt that men of science are liable to make mistakes, partly because their science is not thorough enough, and partly because very much of what is most important can be learned only by one's own observation. It is the union of science and practice which alone can make a perfect farmer. 16. It is often supposed that the scientific principles necessary for intelligent farming are difficult to be under stood. But this is very far from being the case. What chemistry teaches about air, water, arable soil, the nature of plants, manure, and what it is made of, is so easy to be understood, that every well-informed teacher may, in a dozen lessons, and with the simplest means of instruc tion, impart to the commonest farmer's boy an accurate knowledge of it. 17. The learning these things will make the difference between ignorance and knowledge, between seeming stu pidity and real brightness. It will be a great benefit to the individual and to the country. The boy who has been taught in school on what the fertility of the soil depends, and the great danger of the land's being worn out in consequence of wasting the most valuable kinds of manure, and who has been told by his teacher that he who wastes the conditions of fertility is guilty of an offence against the poor, against himself, and against society, will cer tainly, when he grows to man's estate, see how important it is that nothing essential to fertility shall be lost, and will take the greatest pains to save and to use every thing which is thus valuable. 6 THE AIR AND THE GASES IN IT. 18. What is chemistry ? It is the science which tells us what water, air, soil, and all other things are, what they are made of, and how the elements of which they are made act upon each other ; and a person who studies these things, and makes experiments upon them, is called a chemist. CHAPTER II. THE AIR AND THE GASES IN IT. 19. The Air is that which we breathe, and by which we are constantly surrounded. It is very thin and light, and yet it has some little weight. We cannot see it, and yet it is always about us and touching us. The wind is air in motion. We feel the wind, and we may feel the still air when we move our hand rapidly in it ; and we also feel and hear it when we move a stick swiftly through it. If I fill a bladder with air, and press it, the bladder yields ; but as soon as the pressure is withdrawn, it swells out again to its former size. This is because the air is springy or elastic. It is essential to burning, or com bustion. Without air, the candle would be extinguished, and the fire would go out. It is not less necessary to the life of man and other animals, and to plants. 20. The air is composed of a thin fluid or gas, called ori/^'f '/?, (which means, producer of acids,) mixed with another air or gas called nitrogen, (producer of nitre,) or azote, (not sustaining life.) The air also contains a gas called carbonic acid, a small but variable quantity of OXYGEN FOUND EVERYWHERE. 7 watery vapor, and commonly has floating in it smoke and dust, and minute portions of various gases which serve as food to plants, the most important of which are ammonia and sulphuretted hydrogen. 21. Oxygen is the vital part of the air — that which is essential to our life, and also to combustion. It is invisible, and has no taste or smell. Oxygen is thought to be a simple substance; that is, no person lias ever succeeded in showing that it is a mixture or compound of any two substances. It is therefore called an Element, or elementary substance. It is one of the most abundant and widely diffused substances known. It forms eight parts out of nine, by weight, in the composition of water. It enters into the composition of nearly all the rocks and different kinds of earth, and is one of the constituents of all portions of the bodies of plants and animals. 22. A considerable portion of every known rock is oxygen, combined with some other element. How it got into the rocks we do not know. Oxygen has a strong tendency to penetrate into every thing ; it has a great attraction for iron, copper, lead, and most of the other metals, and for nearly all the other substances of which earths are composed, and combines with them intimately, and completely changes their appearance and properties. Iron left for any time in moist air rusts, or is gradually covered with a dirty reddish substance, which we calf rust, which is made up of oxygen and particles of the iron with which it has united. This the chemists call oxide of iron. The iron has been oxidized. This oxide of iron is often found in the earth in great quantities, forming a brownish, heavy dirt or earth ; some times beautiful rocks or ores. Similar earths or minerals 2 8 THE AIR AND THE GASES IN IT. are formed by oxygen uniting with other metals. These compounds are called oxides. 23. Oxygen was called a producer of acids, because it is an element of many of the most powerful acids ; and the name acid is given to several substances which are extremely sour and very corrosive, and produce the effect of turning vegetable blue colors red. 24. Oxygen, for instance, unites with sulphur, or brim stone, in two proportions. If there be sixteen parts by weight of sulphur to sixteen of oxygen, sulphurous acid is formed ; sixteen of sulphur to twenty-four of oxygen form sulphuric acid, commonly called oil of vitriol, a heavy liquid, looking like oil. 25. Eight parts out of nine in the composition of water are oxygen ; the other part is hydrogen. 26. Hydrogen (water producer) is an invisible air or gas, elastic, and without color, taste, or smell, and lighter than any other substance known. One hundred cubic inches of hydrogen weigh 2T^ grains. 27. Oxygen, which is a little heavier than common air, is sixteen times heavier than hydrogen. 28. And common air is about 816 times lighter than pure water. 29. Nitrogen is a gas which alone does not sustain combustion, nor the breathing or respiration of animals. A burning candle placed in a vessel full of it goes imme diately out. An animal placed in it immediately dies. It is not supposed to be poisonous, but merely inert. It serves to temper the violent action of oxygen, which, without it, might consume the lungs which should breathe it. It enters as an essential element into the structure of animals and plants. It has neither color, taste, nor smell. 9 30. But it is" only when alone, or when merely mixed with oxygen, as in common air, that it is so inert. In combination it always plays an active part. All sub stances containing it have a tendency to be decomposed. Chemically, that is, intimately united with oxygen, it forms one of the most violent agents known. 31. Oxygen combines with nitrogen in five different, perfectly definite proportions, by weight, viz. : Protoxide (first oxide) of nitrogen is 14 parts of nitrogen with 8 of oxygen. Deutoxide (second oxide) " 14 " " " 16 " Tritoxide (third oxide) " 14 " " " 24 " Peroxide (highest oxide) " 14 " " " 32 " Nitric acid, aquafortis, is 14 " " " 40 " It seems a very surprising and wonderful thing that these two gases should always unite in such exact pro portions ; that 14 parts by weight of nitrogen should always unite with exactly 8, or twice 8, or three or four times or five times 8 parts of oxygen. Yet this is always the case. And not only do nitrogen and oxygen unite in this exact manner, by this precise law, but all the other elements unite with each other in perfectly definite, inva riable proportions. How this happens no one knows. All we can say is, that the Creator has made things in this manner, so as to unite according to this law. And this is called the Law of Definite Proportions. For when things always happen exactly in one way, we say that they happen according to a laiv of nature. It is incon ceivable that they should always come so by accident. This law is universal. Oxygen always unites in the proportion, by weight, of 8, or some multiple of 8. Nitro gen always in the proportion of 14 ; and every other element has its definite combining number. The com- 10 THE AIR AND THE GASES IN IT. bining number for hydrogen is 1 ; for 'carbon, 6 ; for sulphur, 16 ; for iron, 28. And it is found that 9 pounds of water consist of 8 pounds of oxygen and 1 pound of hydrogen ; and that 28 pounds of iron unite with 8 pounds of oxygen to form rust or oxide of iron. " Take, for example, 9 pounds of water, pass its steam over a known weight of pure iron turnings, heated red-hot in an earthen tube. No steam escapes from the tube, only air, which may be inflamed and burned. It is hydrogen gas, one of the constituents of water. That liquid has been decomposed. What has become of its oxygen ? It has united with and oxidated the iron. What proportion of the water did it form? 8-9ths." If the iron be weighed, it will be found 8 poiinds heavier. Subtracting from the 9 pounds of water, 8 of oxygen, the balance, 1, is hydrogen.* If the experiment be very carefully conducted, it will be found that 28 "pounds of iron have been converted into iron rust, and that all the rust formed by 8 pounds of oxygen weighs 36 pounds. The several elements, or simple, uncompounded sub stances, are, for convenience, represented by the initial letters, and the proportions in which they unite by num bers placed a little above them. Chemists suppose that it is only the least possible, indivisible particles of matter 01- atoms, that unite, and that the atoms combine, 1 with 1, or 1 with 2, or with 3, or 2 with 3, and so on. Oxygen is represented by 0 ; Hydrogen by H ; Nitro gen by N ; Carbon by C ; Sulphur by S. HO is water, I M -cause one atom of hydrogen is supposed to unite * Dana's Muck Manual, p. 44. Whoever wants to ^et a vast deal of knowl edge upon the subject of fertilizers, philosophically stated, in a small compass, may consult this valuable volume. NITRIC ACID, CARBONIC ACID. 11 with one of oxygen. N H3 or Am is ammonia, — three atoms of H and one atom of N. Carbonic acid is C O2, that is, one atom of carbon with two of oxygen. N 0 is protoxide of nitrogen, one atom of each element ; N O2, N O3, N O4, N O5, represent the successive oxides of Art. 31, and nitric acid, in which one atom of nitrogen is supposed to be united with five of oxygen ; and if each atom of nitrogen weighs 14, each atom of oxygen must weigh 8, on the same scale. 32. Nitric Acid, like sulphuric acid, is so excessively cor rosive as speedily to destroy almost any substance exposed to its action. It is a liquid, looking somewhat like water. A flash of lightning, in the air, often causes oxygen and nitrogen to combine, forming nitric acid, which is immediately dissolved by the rain, and is sometimes found in rain water. 33. Carbonic Acid is the gas which rises, in the form of bubbles, in the fermentation of beer, or when you open a bottle of beer, or in the effervescence of cider or of wine. It is the gas which kills a person who remains too long in a close room where there is a pan of burning coals. It is formed by the combination of oxygen with carbon or charcoal. 34. All kinds of wood and other vegetable substances are made up mostly of carbon or charcoal, united with water, or with oxygen and hydrogen, in nearly the same proportions in which they form water. When wood is kindled, it unites with the oxygen of the air. Burning or combustion is the uniting of a combustible substance with oxygen, accompanied with light and heat. 35. The blaze or Flame is formed by the uniting of oxygen with a combustible gas. 2* 12 THE Am AND THE GASES IN IT. 36. The Light and Heat both come from the wood as it burns. While a tree is growing, it receives, from the sunshine, light and heat, and absorbs them, and lays them up in the wood. There they lie, as in a storehouse, till they are brought out by burning.' 37. Ammonia. Hydrogen combines with nitrogen to form ammonia, which is one of the essential articles in the food of plants. 38. Wherever decay or decomposition of any animal substance, or almost any vegetable substance, takes place, there both these gases, hydrogen and nitrogen, are given out, and, at the very moment they leave the other sub stances with which they have been combined, they unite and form ammonia, which 'rises and floats in the air, and is dissolved rapidly by the moisture in the air, and is then brought down to the earth in the rain. 39. The little delicate roots absorb it from the earth, and *it is carried into every part of the plant. Some power in the plant separates the two again, for both are always found in the growing parts; and nitrogen and hydrogen are found in the seeds. 40. Hydrogen unites also with sulphur, and forms a very offensive gas, called sulphuretted hydrogen ; and this also enters into the composition of plants, as a part of their food. 41. In 100 pints of common air, perfectly dry and pure, there are about 21 of oxygen and 79 of nitrogen ; that is, not far from one-fifth of oxygon and four-fifths of nitrogen. In its common state, 100 pints of air contain from 1 to 2J pints of watery vapor; and 1,500 pints contain I pint <>t' carbonic acid. 42. In breathing, the air enters into the lungs, and there the oxygen comes in contact with a portion of the PURE AIR NECESSARY TO HEALTH. 13 blood, and combines with it, much as oxygen combines with fuel in burning, and by this combustion sustains the animal heat, and keeps the body warm. When the air in the lungs is breathed out, it contains less oxygen than the air which had entered. In place of this oxygen which has staid in the body, a portion of carbonic acid is breathed out, which poisons, to a certain extent, the surrounding air. In this way the purity of the air would soon be destroyed, and it would be rendered unfit for breathing, if pure air were not brought in. The quantity of air thus rendered unfit for respiration is known, and we can calculate exactly the space and the number of cubic feet of air which ought to be provided in chambers for men, and in stables and other places for other animals, according to the number and size of the animals to be shut up in them. A Man needs from 200 to 350 cubic feet of pure air every hour. Supposing a person to require only 250 feet an hour, a close room of 10 feet in each dimension, having its air rendered more and more impure by his breathing it, will, in four hours, be foul and very unwhole some, and wholly unfit to breathe. 43. It is thus plain that every place occupied by a living being, particularly by night, ought to be ventilated. That is, it ought to have a communication, by means of a chimney flue, or in some other way, with the pure, open air. Neither the body nor the mind of a person who has to breathe, night after night, the close, foul air of an ill-ventilated room, can remain healthy. 44. Plants do not breathe as animals do. But air is just as essential to them, penetrating freely into the tissues of their green portions, and there playing a part 14 THE AIR AND THE GASES IN IT. necessary to their existence, and not wholly unlike animal respiration. 45. By daylight, and especially in the sunshine, plants absorb carbonic acid, turn the carbon, and water, or the elements of water, into the substance of the wood, stem, leaves and the other solid parts, and throw back part of the oxygen into the air. Growing plants are thus continually acting to purify the atmosphere, by taking up the carbonic acid which is poured into it by com bustion, by decay, and by the breath of animals, and giving back oxygen suitable for healthy respiration. We thus see the wise and beautiful Relation which has been established between animals and plants. The wind which blows from the habitations of men and animals carries foul air, no longer fit to be breathed, away to the woods and fields. There the plants extract from the air all that is poisonous ; and the wind which blows from the field and forest brings back only the pure and vital element of oxygen, mixed with harmless nitrogen. 46. In the night time plants do not exercise this benefi cent influence. On the contrary, they then exhale carbonic acid, at least in small quantities. It is this, perhaps, which renders it unsafe to have plants, especially when in flower, in a sleeping room. It would seem that wood or woody fibre is not formed during the night, but that the presence of the sun's light is essentially necessary to this action of the life of a plant. 47. The oxides of the metals, and some other com pounds, arc bases; that is, they unite chemically with carbonic acid, sitf/i/nirir nritl, nitric r/r/V/, and other acids, and form salts, called carbonates, sulplialcs, nitrates, and other ales. SALTS, HUMUS, DECAY. 15 They have been named Salts, from their resemblance to common table salt, though their properties are usually very different. 48. Carbonic acid, for example, intimately combined with lime, forms a salt called carbonate of lime, which is chalk or limestone. Sulphuric acid, combined with lime, forms sulphate of lime, or plaster of Paris. Nitric acid, chemically combined with potash, forms nitrate of potash, or saltpetre. All these are salts of great impor tance in agriculture. 49. Oxygen is also continually combining with wood and other vegetable substances. The decay of the fallen leaves is produced by oxygen slowly combining with the carbon of the leaves. Moisture and warmth are favorable to this combination, or oxidation, and heat is always pro duced by it. A heap of leaves, decaying, grows warm and continues warm till they are all turned into leaf mould, geine or humus. So the very gradual decay of trunks of old dead trees, and of every thing made of wood, is principally owing to the combination of oxygen with the carbon in the wood. Nearly all decay is produced by oxygen. It is oxida tion. During the process of decay of vegetable substances, not only carbonic acid, but, previously, humic acid, (from humus, earth,) and ulmic acid, (from ulmus, an elm,) are formed. Both these are made of carbon, hydrogen and oxygen, and both are elements of the food of plants. 50. Humus, or geine, in all its states, is a compound of carbon, with the elements of water, oxygen and hydro gen. When decay has just begun, the decaying substance is called ulmin; with a little more oxygen, it becomes ulmic acid. In both these, there is more hydrogen than is necessary to form, with the oxygen, water. 16 THE ATMOSPHERE. 51. With the addition of more oxygen, just enough to form water, humin and then humic acid are formed. By the addition of still more oxygen, the humus is turned, successively, into geic acid, crenic acid, (krene, a foun tain,) and apocrenic acid. Several of these are often found, at once, in a mass of humus. 52. If nitrogen be present in a moist, decaying mass of substance, it unites with hydrogen, and forms ammo nia ; and a part of the ammonia, acted upon by oxygen, is gradually turned into nitric acid. CHAPTER III. THE ATMOSPHERE AND THE FORCES ACTING IN IT. 53. The air forms about the earth a coat which we call the Atmosphere, (vapor-ball,) and which extends upwards forty or fifty, perhaps two or three hundred, miles from the surface of the earth. 54. The atmosphere is the great ocean in which all animal and vegetable lives exist, and all the influences and agencies which act upon them are at play. Among those are light, by which all visible things are made known to us ; heat, which pervades, and expands, and moves all things, and is essential to the life both of animals and of plants ; moisture, alike essential, and by which nearly nil things are softened or mollified; sound, with out whiv-li the earth would be a silent desert, and voice and music, and the pleasure of social life could not exist; and the wonderful cause of thunder and lightning, which we call electricity. FORCES AT WORK IN THE ATMOSPHERE. 17 55. Iii the atmosphere, great operations are going on ; all things are perpetually mingling, or trying to mingle. The winds are blowing, in vast circuits, from zone to zone, bearing heat from the equator and cold from the poles, moisture from oceans, lakes, and streams, and dry- ness from the mountains and plains, and scattering dust and the seeds of plants and the eggs of minute animals. Into the atmosphere are continually rising- vapors and exhalations from all moist and all decaying substances ; poisonous gases from the breath of man and other ani mals, and from burning volcanoes and the fires which are kindled by accident, or for the uses of man. All these are constantly striving to diffuse themselves, and to penetrate and mingle with each other and with parts of the solid earth. 56. The sun is continually darting his rays of light and of heat in every direction, illuminating and warming every thing within the sphere of their influence. Every star, every fire, every candle is doing the same. Oxygen is always tending, with ceaseless effort, to enter into and combine with other things. Every other gas and vapor is, by its nature, diffusing itself in like manner. Water moistens, that is, enters into, every thing with which it can come in contact — the air, and all things in it, the earth, and the solid rocks. 57. And this it does by that force by which particles near each other are drawn nearer. It is this force which makes the particles of water rise upwards from the ground into a heap of ashes or fine sand, and penetrate among the fibres or grain of wood. It is this which draws water up into a tube of glass with a bore as fine as a hair, whence it is called Capillary Attraction, (from capillus, Latin, a hair.) 18 THE ATMOSPHERE. 58. Another cause of the penetration of water is the force which draws fluids of different densities through a par tition of thin skin or film placed between them, and makes them mix. This is called Osmotic Action. We can easily conceive how this action takes place. Water spreads itself continually, and enters into what ever is in contact with it more readily than any other fluid. Thus it moistens and gets through a film more rapidly than the fluid on the other side, which also penetrates, but less readily. Both of them continue to move on, but the water always more rapidly. 59. Oxygen combines with the particles of metals and turns them into rusts or oxides; and, aided by moisture and warmth, it unites with the elements of wood and all other things made of carbon and hydrogen, and causes them to decay. 60. Do not the heavy gases, like carbonic acid, sink to the bottom of the atmosphere, and the light ones, like hydrogen and carburetted hydrogen, rise to the top ? No. Each gas spreads or diffuses itself throughout all the atmosphere. As much carbonic acid is found at the top of a mountain as in the bottom of a valley. If a plant has an attraction for ammonia, it draws to itself the ammonia near it, and combines with it; but the ammonia at a distance rushes in, comes near, and is attracted and combined also, and streams of it keep coming in from all quarters. 61. Heat, too, spreads itself, unceasingly, in every direction, and that in two ways. If it spreads from par ticle to particle, as it docs in a piece' of iron, or any other solid, or as it docs in the earth, it is said to be conducted, or to spread by conduction. If it darts out, as it docs, in straight lines, from all things surrounded by air or open RADIATION. — GRAVITATION. 19 space, it is said to spread by radiation. As it spreads, it expands every thing ; and as the temperature is every where continually changing, from winter to summer, from day to night, and every hour of the day and night, all solids must be constantly expanding and contracting, and the particles of which they are composed must be continually approaching to and receding from each other. In liquids, the particles that are warmed expand and rise, while those that are cooled contract and sink, thus producing currents upwards and downwards in the liquid. Particles of other substances, floating or suspended in the liquid, as they become warmer, rise towards the surface, and, as they cool again, sink towards the bottom; or, if one side of a particle expands more rapidly than another, it turns over, seeming as if it had life and volun tary motion. The vapors &nd gases, expanded by heat, become lighter, rise upwards towards the surface of the atmosphere, and their place is taken by cooler ones from every side. 62. Why does not this perpetual strife of forces produce disorder and chaos? These forces are not lawless forces. They all have their limits within which they are compelled to abide. Besides, there are other mighty forces always acting against them, and constraining them to keep within their bounds. 63. One of these forces is the Attraction of Gravitation, which makes a stone fall to the ground, and draws every particle, every atom, towards every other, and all. towards the centre of the earth, and the earth itself towards the sun. This gives them all their weight, and brings them to rust, and keeps them in their places. 3 20 THE ATMOSPHERE AND THE FORCES IN IT. Another is the force which binds the particles of a stone or of any other thing together, and makes it hard or strong or tough, which force we call the Attraction of Cohesion. Another is the force by which different tilings stick to each other, as mortar to a brick, or glue to wood, which we call the Force of Adhesion. And there are doubtless other forces which we do not so well understand. 64. One of these unknown forces is the Force of Vegeta ble Life, which draws into a growing plant the several substances which are necessary to its growth, and out of them forms all the parts of the plant. Another is the Force of Animal Life, which turns its food into the flesh and bones and other parts of the animal. A third is the Power which the Light of the Sun exerts upon all vegetables and animals, upon all colors, perhaps upon all things within its reach. A fourth is the power by which electricity draws light bodies, and perhaps heavy ones, towards an electrified surface, and again repels them. 65. It is from the influence of the sunlight that the carbonic acid and water in the sap of growing plants arc, turned into the substance called woody fibre, which gives them their hardness and strength. A woody plant, growing in the dark, lengthens, but forms no true wood, and so has no hardness. It is the influence of this light which causes the evapo ration at the surface of the leaves, which thickens the juices, and -changes them into nourishing sap. Without the sunlight, the peculiar odors and tastes are not formed, nor all the beautiful variety of colors. 66. That the light of the sun has this great power over plants, is shown by the fact that most of those plants which naturally grow in places where the sunshine daily EFFECT OF LIGHT ON PLANTS AND ANIMALS. 21 conies, refuse to grow in the shade. Or, if one grows in the shade, it has none of the sensible properties, neither the strength, nor hardness, nor color, nor smell, nor taste, which it would have had growing in the sunshine. In the growth of a tree, the stronger and fuller the light to which it is exposed, the greater the amount of carbon which is formed into its texture, and the harder and more compact its wood. 67. A single experiment shows that it is~ light and not air which gives wood its strength and hardness. Plant a little tree in a dusky room, with two openings, one admitting light but no air, the other air but no light, and all the little branches will soon turn towards the light. 68. This seems to be because on the side of a branch towards the light, wood is formed, the growth is checked, and the branch hardened ; on the other side, growth con tinues more rapidly, and the parts lengthen, and thus bend the little branch over towards the harder side. During very warm, moist nights, plants may grow in length and in every other dimension. In the sunlight only do they form wood. Hence it is that in seasons of unusual sunshine, the wood in a tree fully exposed to the sun is formed with more than common perfection, as is also the bark. 69. The power of the sun's light upon animals is not less striking. The animals, — beasts, birds, fishes and insects, — of the torrid zone, where light is intense, have more activity, more vivacity, and more brilliant colors than animals of the temperate and frozen zones. All animals suffer from being shut up away from the light. 70. Human Beings, not less than other animals, Suffer from being kept away from Sunshine. 22 THE ATMOSPHERE AND THE FORCES IN IT. A child properly managed, and left to spend a good many hours every day in sunshine, has more color, more strength, more activity, more health, and better spirits, in consequence. A child kept away from the sunlight is pale, weak, dull, delicate, and sad, and is liable, when this exclusion from the sun's light is long continued, to many forms of fearful disease. 71. The sun, and, with it, the air, are constantly acting, with great power, upon the soil. The heat of the sun swells or expands the particles, and thus makes room for the entrance of the air ; and the oxygen of the air and the other gases which float in the air combine with some of the elements of the soil, and render them fit to aid in the growth of plants. Other beneficial effects are produced, of which more will be said hereafter. All these are increased by the frequent stirring of the soil. Hence it is that when trees are to be planted, it is important to dig the holes some time beforehand, in order that the fresh earth in the holes may be acted upon by the sun and the air as long as possible. 72. The atmosphere produces many other different effects upon animals, upon plants, and upon the soil, varying with the direction and force of the winds, heat and cold, the weight and the moisture of the air, rains and droughts, dews, clouds, and fogs, mists and storms. 73. What is Electricity? We know it only by its effects. If we rub a rod of amber, or scaling wax, with a piece of woollen cloth, the amber or wax is immediately excited, and draws towards itself, or attracts, light bodies, such as bits of thread, or of elder-pith hung to a thread. The cause of this attraction was called electricity, from ELECTRICITY. — OPPOSITE ELECTRICITIES. 23 its being first observed in excited amber, which the Greeks called electron. A rod of glass may be excited in the same manner by rubbing with silk. But in this case the electricity is of a different kind. 74. Take a smooth piece of iron or brass, or any other metal, and hang it up by silk threads so .that it shall not touch or be near to any thing, and fasten to it several pith balls hung to the end of cotton threads. Rub the* piece of metal with a rod of excited amber or sealing wax, and, immediately, electricity is excited, and the pith balls are repelled, and fly from each other and from the metal as far as they can go. Bring the rod of amber or wax near to the balls, and they will be repelled and avoid it. But if you bring a rod of excited glass near them, they will be attracted, and will fly towards it. The elec tricity excited in the glass is of an opposite kind to that excited in the amber, and the opposite electricities attract each other. 75. Touch the metal with a finger, and the little balls immediately fall together again. The electricity is dis charged through the finger. 76. Something similar is supposed to take place with vapor. When water is turned into vapor by the sun's heat, it forms little hollow bubbles or vesicles, which repel each other in consequence of being electrified by evaporation. Any thing which draws off the electricity of a cloud of such vapor causes the little vesicles to collapse, and rush together, and form drops of rain. Ll U i- VNIVKKSITY '.; - 24 THE ATMOSPHERE. CHAPTER IY. CHANGES IN THE ATMOSPHERE. — INSTRUMENTS TO MEASURE THEM. — CLIMATE. 77. The state of the atmosphere is continually changing, and several instruments have been contrived for the pur pose of measuring its changes, and of showing what its state is. The three most important are, — (1.) The thermometer, (heat-measurer,) which shows the changes in the heat of the air ; (2.) The barometer, (weight-measurer,) which shows the changes in the weight or pressure of the air ; and, (3.) The hygrometer, (moisture-measurer,) which shows the changes in the amount of moisture in the air. 78. The Thermometer is constructed on the principle that almost every substance known is swelled or expanded by being heated, and contracted by becoming cooler ; and that the expansion is in proportion to the degree of heat. 79. This may be proved by various experiments. If a hole in a plate of iron is just large enough to admit a rod of iron when cold, it will be found that, when the rod is heated, it will no longer enter. If the rod be left to cool down to its former temperature, it will enter as at first. This shows that the rod has been expanded by heat, so as to take up more room than it had previously taken up. When a wheelwright makes an iron tire for a wagon wheel, he makes it just long enough to bring the fellies closely together. In order to do this most effectually, he makes it a little too short to go on while cold. He there fore expands it by placing it on a circular fire, and when THERMOMETER. 25 it is hot, he easily slips it on. Upon cooling, it contracts, and so draws the fellies firmly and closely together. 80. There are several kinds of thermome ter. That in common use in this country is called Fahrenheit's, from the name of the person who first made it. It is made of a glass tube (A B fig. 1,) having a small bore, with a bulb (A) at one end, filled with quicksilver, and fastened upon a plate of metal or other substance, which is to be marked with degrees. When it is to be marked, or graduated, the bulb and tube are held in a mixture of melting snow, or of snow or ice and water. The quicksilver within the tube contracts and falls to a cer tain point, where it remains. Just against this point a line is drawn on the plate of the rig. i. frame, and the number 32° (thirty-two degrees) is marked at the end of it. This is called the freezing point. The thermometer is then held in boiling water. The quicksilver expands and rises till it reaches a point at which it remains stationary. Against this point a mark is drawn on the plate, and the number 212° (two hundred and twelve degrees) is made. This is called the boiling point. The space between the freezing and boiling points is divided into 180 equal parts, called degrees. The space below the freezing point is divided into parts of this same length, down to the bulb. A thermometer, to be used to measure extremes of cold and heat, should be long enough to extend from 40° or 50° below the freezing, to a few degrees above the boiling point. But as this requires a long tube, instruments for common use are marked up to only 140° or 150°. 26 CHANGES IN THE ATMOSPHERE. The thermometer is an instrument of great utility to the farmer, and indeed to every intelligent person. 81. A Barometer is constructed upon the principle, now a well-known fact, that air has weight. It can be weighed by a delicate balance, by first filling a flask with air and weighing it, and then drawing out the air by an instru ment called an air pump, and weighing the flask without the air. At the level of the sea, one hundred cubic inches of air weigh 805 grains, while water weighs 816 times as much. 82. The air seems to be pressed towards the earth by its weight, just as water is kept in the ocean and in lakes by its weight. Its pressure is greatest at the level of the sea, because of all the air in the sky above. As we ascend a hill or mountain, the pressure becomes less, because there is less air above us, and because the attraction of gravitation is diminished. The air is constantly in motion ; and its pressure upon the surface of water, and upon all other surfaces, is constantly varying. The purpose of a barometer is to measure this varying pressure. 83. A barometer is made of a large tube of glass, pre cisely like that of the thermometer (A B fig. 1,) but much longer, — not less than 32 or 83 inches long, — with a bag or bulb at one end, filled with mercury, or quicksilver, so contrived as to rise to a certain height in the tube, while it has the air bearing upon it in the bag or bulb. From the upper end of the tube the air is first completely withdrawn or exhausted, by the tube's being held upside down. The tube is then turned back and fastened to a wooden frame, or enclosed in a case with a graduated plate behind the upper end of the tube, on which plate are marked the heights of the column of quicksilver. BAROMETER. 27 84. There is no pressure upon the top of the mercury in the tube, and the pressure of the air upon the mercury in the bag forces up the mercury in the tube till its weight exactly balances the weight, or downward pres sure, of the air. The pressure of the air is sometimes greater, sometimes less, but is commonly sufficient to balance the downward pressure of a column of mercury 29 or 30 inches long. As the pressure of the air increases, it causes the mercury to rise higher ; as it diminishes, it allows the mercury to fall lower ; and these changes are seen, by observing how high the surface stands as marked on the graduated scale. Changes in the weather are sometimes foreshown by changes in the height of the mercury as indicated by this scale. 85. The downward pressure, or weight, of a column of mercury 30 inches long, and an inch square at the bottom, is 15 pounds ; and as this column is sustained by the pressure of the air, every where near the level of the sea, we conclude that the pressure of the air, on every square inch, is 15 pounds. 86. When the mercury in the tube is slowly and gradu ally rising, it commonly indicates the approach of fine weather. "When it is regularly and slowly falling, it indicates foul weather. A rapid and sudden fall of the mercury threatens a violent wind. While it is rising, the surface of the mercury is convex, or swelling upwards ; when falling, concave, or hollowing. 87. A very compact and convenient barometer is made at Lowell, Mass., of a somewhat different construction. A short column of mercury, in a glass tube, (c D fig. 1,) is pressed upon, at the upper surface, by the atmosphere, with which it has communication. The other end of the 28 CHANGES IN THE ATMOSPHERE. column of mercury presses upwards upon perfectly dry air confined in an enlargement (c) of the bent tube. When the weight of the atmosphere increases, the mercury is pressed doivnwards in the long arm and rises in the short arm of the tube, the dry confined air, from its elasticity, yielding to the pressure. The length of the column of mercury is marked upon a graduated scale placed on one side. A movable scale, (E F) called a vernier, is attached, so contrived as to measure the height of the column to hundredths of an inch. 88. Careful observation of the winds, and of the barom eter, with a knowledge how to observe, will often enable a person to foresee rain for some hours, or a day, or pos sibly longer, before it comes ; but no person can yet predict, with any certainty, whether the succeeding month will be dry or rainy. It is only of late that careful and continued observa tions have been carried on, upon a large scale, to discover the laws of storms. It is found that nearly all storms, in the Atlantic States, come from the west, and travel pretty rapidly from west to east. Hereafter we may know, certainly, the approach of a storm many hours before it reaches us. Prof. Henry, at the Smithsonian Institution in Washington, having telegraphic communi cation with many parts of the country, is usually able to predict the approach of a rain-storm twelve hours before it comes. 89. Of what are commonly considered the Signs of Rain, none are entirely reliable. When the sun sets clear, with a westerly wind, and the clouds float high and in round, compact, well-defined masses, we may expect the next day to be fair. But when the sun sets in a deep mass of HYGROMETER. 29 cloud, with a southerly wind, rain may be expected, that night or next day. When the swallows fly low and often dip their wing's in the water over which they are flying, when the crow cries louder and more frequently than common, when water-fowl are very noisy and active, when dogs appear unusually dull and sleepy, when pigs run about and look uneasy, when the croaking of frogs is loud and general, when earth worms are seen in great numbers on the surface, some people expect rain. 90. The principle iipon which the Hygrometer is con structed is the fact that there is always more or less moisture in the air, and that this moisture is absorbed by certain substances, making them heavier, and enters into lines or cords made of other substances, making them thicker and shorter. 91. A hygrometer may be made of a piece of sponge filled with a solution of some salt, which has an attraction for water. This sponge is suspended to one end of a balance, and, as it grows heavier by the moisture absorbed, causes the other end to rise, and thus indicates the quantity of moisture in the atmosphere. Or it may be made of a cord or string, with a weight attached, placed over a pully, and showing the moisture by its lengthening or shortening. 92. A still more delicate hygrometer is formed of two thermometers on the same frame, the bulb of one of which is covered with thin gauze, which may be kept continually moist by a contrivance like a wick, communi cating with a cylinder kept full of water. The moisture on the gauze evaporates and cools the bulb within. The amount of evaporation depends upon the dryness of the 30 CHANGES IN THE ATMOSPHERE. atmosphere, and is shown by the difference between the two thermometers. 93. By means of these three instruments, and knowing how to use them, an intelligent husbandman may select the moment most favorable or most important for certain operations ; and can often predict, with an approach to probability, what changes will take place in the weather before night or before the next morning. 94. The Variations in the Temperature of the air depend first, upon the seasons, — from the cold of winter to the heat of summer ; 2d, upon the direction of the wind, — some winds always bringing cold, others always bringing heat; 3d, upon* the clouds, which prevent the sun's light and heat from falling upon the earth. 95. The atmosphere being in cbntinual motion, like the waters of the ocean, the column of air over us is sometimes longer and heavier, and sometimes shorter. 96. Variation in the Moisture of the air depends chiefly upon the winds, which bring on air more or less abun dantly charged with moisture, according as they have passed over seas, lakes, or rivers, or over a continent. In the Atlantic States gf America, the easterly and southerly winds, coming from over the ocean, are always full of moisture. The south and west winds, coming from warmer regions, arc warm, and, in proportion as they are more westerly, are dryer winds. The north and west winds, coming from the mountains and plains of the continent, arc dry and cold. The coldest and dryest are the north wind and the north-west wind, and any wind from a point between the two. The moisture also depends on the temperature. Heat dissolves moisture as water dissolves salt. When the air is warm, it can contain a great deal of moisture ; but as DEW. 31 the air cools, the moisture in it is condensed into clouds, fogs, or mists, and finally into rain. 97. There are many other atmospheric appearances or phenomena which it is important for the husbandman to be acquainted with, such as dew and hoar frosts, which take place during the night, when the sky is clear ; snow, which seems to be frozen mist ; hail, and hurricanes, which are by some persons attributed to the action of electricity. 98. The Formation of Dew depends upon a property which all solid substances have, in a greater or less degree, according to their nature and outer surface. When I hold my hand towards the fire, I feel the heat darting out from the fire to my hand. I feel it darting out, in the same manner, from a hot stove or from a hot flat-iron, on whatever side of the stove or iron I hold my hand. The heat which darts out thus in every direction from any hot thing is said to radiate from it, because it comes out straight from it, just as the spokes, (radii, in Latin,) come out on every side from the hub of a wheel. If I observe carefully, I find that the heat comes out more abundantly from a stove the surface of which is very rough, than from one which is very smooth ;' and I discover that the reason is, that every little projecting point radiates a stream of heat. Now, what I find to be true of the surface of a hot stove is true of every surface. Every solid body is con tinually sending out heat in straight lines, — radiating heat, — from its surface. If several bodies are heated to the same degree, the one which is roughest will radiate and consequently cool most rapidly. When the sun sets, all things which have been exposed to his heat send it forth by radiation, and grow cool. 32 CHANGES IN THE ATMOSPHERE. Those things which have the roughest surface, like the stems and leaves of grass, cool most rapidly. The heat thus radiated is sent out into the thin air, and, if there are no clouds, is lost in vast space. The air which is near to these blades of grass imparts its heat to them and grows cold. The air thus becomes incapable of holding in solution all the water it had dissolved, and deposits it, in minute particles, upon the surface of the grass. The radiation- goes on, and the moisture continues to be deposited, till the blades of grass are covered with drops ; and these drops are drops of dew. Now, just as, by placing a screen before a fire, we pre vent the heat from being radiated into the room, and send it back to the fire, so a screen of clouds stretched over the earth prevents the heat received from the sun from being rapidly radiated into the empty air, and thus prevents the formation of dew. We find, accordingly, that dew is formed only on clear evenings. 99. Hoar-frost is formed in precisely the same manner as dew, but at so low a temperature that the moisture freezes as it collects on the radiating surface, and, instead of forming round drops, shapes itself into slender needles of ice. 100. The Climate of a Country is the general effect of the combined action of all the causes just spoken of, viz., heat, moisture, wind, and of others still.* The husband- * Humboldt says : " Tho expression ' climate ' signifies all those states and changes of the atmosphere which sensibly affect our organs — temperature, humidity, variation of barometric pressure, a calm state of the air or the effects of different winds, the amount of electric tension, the purity of the atmosphere or its admixture with more or less deleterious exhalations, and, lastly, the degree of habitual transparency of the air and serenity of the sky, which has an impor tant influence not only on the organic development of plants and the ripening of fruits, but also on the feelings and the whole mental disposition of man." — Cosmos, I. 313. CLIMATE. 33 man ought to understand the climate of the country in which he lives, in order that he may accommodate himself to it in the management of himself and of the animals and plants he has charge of. 101. Our New England climate is one of extremes. The heat is very great in summer, and the cold very severe in winter. The climate of the west of Europe is far milder. As we go west from the Atlantic the climate becomes less extreme. 102. So great is the influence of climate that each country has its own peculiar productions, which it is often difficult to acclimatize, that is, make to flourish, in any other ; and, before introducing a new plant or animal upon his farm, the farmer ought to ascertain whether it is suited to the climate. But both plants and animals from distant countries are frequently introduced with success ; so that, without a fair trial made by himself or some one else, the farmer ought not to take it for granted that a new plant or a new animal will not be safely and successfully introduced. 103. The Diversity of Climate depends on many causes ; some general and some particular and local. Among the general causes, the first is latitude, or the distance from that part of the earth where the sun is at noon directly, or vertically, overhead. The heat depends, in a great measure, upon the height above the horizon to which the sun rises at noon. The higher it rises, the hotter it is. The second cause is elevation above the level of the sea. The higher Ve go above this level, the colder we find it, till we reach the tops of lofty mountains, where the snow never melts. 34 OP WATER. The third cause is distance from the sea. Nearness to the sea has a tendency to moderate the cold of winter and the heat of summer ; and islands in the ocean have usually a more equable climate than any part of a con tinent. Another cause, particularly affecting the ripening of fruits, is the brightness of the sun, from the clearness of the atmosphere. The heat of clear, uninterrupted sun shine ripens fruit more rapidly and develops the sweet and rich juices more effectually than the same amount of heat under a cloudy sky. 104. Some of the particular and local causes are the condition of the surface of a country, whether it is covered with woods, or bare, situated on the mountains, on a plain, on the side of a river, or at the bottom of a valley, protected against the prevailing cold or hot winds, or exposed to them ; and the nature of the soil, its inclination, and its exposure to the south or north, to much or to little sunshine. CHAPTER V. OF WATER. 105. Though it seems so simple and pure, yet water is, as has already been said, a compound of the two ele mentary substances, oxygen and hydrogen. As it is of vital importance, in the economy of nature, it is found in the greatest abundance, filling lakes and seas and oceans. THREE FORMS OF WATER. — LATENT HEAT. 35 It is indispensable to the nourishment both of plants and of animals ; and it dissolves much of the other food with which plants are nourished. 106. At the usual temperature of the greater part of the year, water is a transparent liquid, which, when pure, has neither color, taste, nor smell. But while water is the great solvent of vegetable food, it is itself dissolved by heat, a still more powerful solvent. 107. Water is found in the three forms or conditions of ice, water, and vapor, according to the amount of heat with which it is combined. (1.) With little or no heat, it is solid Ice or snow. If extremely cold ice be placed in a kettle over a fire, it will be found, by observing a thermometer with its bulb placed within it, to rise gradually until it reaches 32°. It then begins to thaw or turn into water, and if a steady fire be kept up, under the kettle, it continues to thaw until all the ice becomes water. During all this time, though heat from the fire is constantly entering it, through the kettle, it continues of the same temperature, just at 32°. What has become of the heat ? It has been used up in dissolving the ice and turning it into water. It has not rendered the water warmer ; it is hidden or latent in the water ; and is called the Latent Heat of the water. Ice has been changed by combining with heat, into (2.) Water. If, now, the same steady fire be continued under the kettle, the temperature of the water gradually rises to the boiling point, 212°, and then begins to boil. With the same steady fire, the water will entirely boil away, or evaporate, in a certain space of time. And it will be found that it takes more than five times as much heat to boil the water all away, as it had taken to raise it 180°, 4* 36 OP WATER. from the freezing to the boiling point. At the same rate, the water would have been raised nearly to 1,000°, if it had not been dissolved by heat and turned into (3.) Vapor. The vapor thus formed is no hotter than the boiling water. It does not rise above 212°. What has become of all the heat? It has been used up in turning the water into vapor. This heat is not indicated by the thermometer. It seems to be latent in the vapor ; and it is called the Latent Heat of the Vapor. 108. The boiling of water is the agitation produced by the rising of the vapor, formed at the bottom of the kettle, up through the rest of the water ; and the vapor is more abundantly formed in proportion as the heat of the fire is greater. But the water does not change its temperature in consequence of the violent ebullition. For common cooking, therefore, the gentlest boiling is just as effectual as the most violent. 109. At the boiling point, vapor is formed very rapidly. But water, exposed to the air, is continually evaporating, at every temperature. Indeed, such is the tendency of water to take the form of vapor, that even snow and ice. in the air, are constantly turning into vapor. Wherever it takes place, evaporation always uses up heat, or causes it to become latent, and thus cools the air and all sur rounding objects. Indeed, whenever vapor, or air, or any other gas, expands, so as to occupy more space, it at the same time requires more heat and absorbs it from every thing within its reach capable of furnishing it. Its capacity for heat is said to be increased. 110. When, 011 the contrary, vapor turns again to the state of water, it gives out all the latent heat which it had taken in, while turning from water into vapor. The same is true of other gases. Whenever they are con- CLOUDS. — FOGS. — MIST. — RAIN. 37 densed, they give out the heat which had sustained them in the form of gas. And, in like manner, when Water Freezes, it gives out the Heat which it had taken in, while turning from ice into water. We thus see why it happens that, to protect vegetables, in a cellar, against freezing, we have only to place tubs of water there, the warmer the better. The temperature of the cellar will not fall below the freezing point, till the water has been converted into ice. 111. The atmosphere always contains moisture ; that is, water in the state of vapor, which the heat of the sun has drawn up from the surface of the earth and sea, and which floats, invisible, in the air. The warmer the air is the more water it can contain. When the air cools, the invisible vapor which it contained becomes visible in little hollow globules or vesicles, like minute soap bubbles, and forms clouds, fogs and mists. 112. The difference between clouds and fogs or mists is chiefly their situation. Clouds are at a distance or high up in the air ; Togs are clouds near the earth ; and if the fog be thick enough to wet us considerably, without drops, we call it Mist. When a person, looking at a dis tant mountain, sees it capped with a cloud, another per son, standing on the top of the mountain, finds himself surrounded by fog or mist. 113. Rain. The air itself may be capable of dissolving water, but the quantity which the air can hold depends upon its warmth. Wind which has long been blowing over the sea becomes completely saturated with moisture in the state of vapor. If it now blow upon low land warmer than itself, the air becomes warmer and retains all its moisture ; if upon land colder and gradually or rapidly higher, it is cooled 38 OF WATER. and parts with its moisture. The vesicles of vapor are brought near each other, come together, and form drops large and heavy enough to fall, and which cfome down as rain. If air full of moisture be met by air much colder than itself, the sudden cooling causes the water to be thrown down, or precipitated, in torrents of rain. 114. The cause of the fall of rain' in a thunder shower is thought to be the fact that electricity is always evolved during evaporation, and that a cloud formed by evapora tion must be therefore charged full of electricity. When a cloud so charged meets another, or a mass of air, charged with the other kind of electricity, the opposite electricities rush together and unite in a lightning flash, and the moisture held suspended by the action of elec tricity is precipitated to the ground. 115. When, during the formation of the rain drops, the temperature of the air is below the freezing point, the vesicles of moisture, or their fragments, are frozen into little icy needles, which unite, at an angle of GO0, into beautiful, star-like flakes of Snow, and fall to the ground. Snow has been called " the poor man's manure." It always brings down with it fertilizing substances ; and it performs a most important office in many regions, by cov ering over and protecting from extreme cold the surface of the earth with all its clothing of plants, and keeping in the warmth which had entered the earth during the previous summer, and preventing its being radiated away into empty space. 11 C>. How Hail is formed is not perfectly well known. Hail seems to be drops of rain frozen. Electricity lias something to do with it, and in some parts of Europe, SPRINGS. — WATER A SOLVENT. 39 hail storms have been rendered much less frequent by the use of lightning rods. 117. Springs. The water which falls upon the earth in rain, sinks into the ground and moistens it ; and, when very abundant, penetrates deeper, till it meets with beds of rock, or clay, or of some other impermeable earth, that is, earth through which it cannot pass. It runs along the surface of these beds until it meets a natural opening, out of which it issues as a fountain or spring. Or, it may remain in a basin, on the surface of the impermeable bed, and be safe, as in a reservoir, until an artificial outlet is made by digging a well. 118. From springs run little rivulets, by the union of many of which are formed brooks, rivers and lakes ; the waters of all of which commonly flow at last into the sea. There, the heat of the sun raises it in vapor to begin again the beneficent circuit, and form mists and clouds and rain. 119. Water is essential to the life of every plant. Sev eral of the substances on which plants feed, can penetrate into their cells and thence through the tissues, only after being dissolved in water. With it they are sucked in by the roots, and in it are carried to the very extremities of the plant. 120. Next to heat, water is the most universal solvent. The rain, as it descends, absorbs and condenses the gases which float in the atmosphere, and brings them down into the earth fit for the use of plants. Of ammonia it can dissolve 780 times its own bulk ; of car bonic acid, its own bulk ; and it commonly brings down a portion of air, rich in oxygen, and sometimes nitric acid. It also absorbs and brings down all kinds of dirt, and other impurities, numerous minute seeds of plants, and 40 OP WATER. invisible eggs of microscopic animals, and thus cleanses and sweetens the atmosphere. 121. Evaporation from the surface of the earth always cools it. But, on the condensation of ammonia, and the other gases, the reverse must take place. The heat which had held them in a gaseous form, is given to the water in which they are absorbed and condensed, warms it, and, sinking into the earth, warms the soil. 122. Plants absorb a large quantity of water through every part of their surface, but chiefly through their roots. But by the action of light and heat, they exhale a good deal of it through the leaves. You have only to cover a plant exposed to the sun's light with a bell glass, and you will presently see the inner surface of the glass covered with dew, and soon after with little drops. The evaporation which is going on from the surface of leaves is one of the sources from which the moisture of the atmosphere is supplied. As we are subject sometimes to excessive heat and drought, and sometimes to excessive rains, the object of the farmer should be to guard against both, and to render his fields, as far as he can, indepen dent of variations in moisture. 123. We manage to prevent plants from suffering for want of water by irrigation, that is, watering with little streams, when these are possible and not too expensive ; and by other artificial means. We can do something towards it, often we can do a great deal, by keeping the tops of the hills in our neighborhood covered with trees. 'l'h« -so attract and impede the clouds, and induce them to pour down their rain. 1:M. DiM-p ploughing, by rendering the earth to a con- oV|.ih r:ipahlo of retaining moisture, will also TO RETAIN MOISTURE. — DRAINAGE. 41 do something ; and fertilizing with substances which attract moisture, will do still more. Every thing done to improve the soil makes it retentive of moisture. Clay, mixed with a sandy soil, converts it into a retentive loam. The*, remains of vegetable and animal substances form a spongy matter in the soil, which acts as a reservoir to retain the moisture and other food of plants, and yield it only to their roots. 125. The rain, as it falls, always contains carbonic acid, ammonia, and other elements of plant nourishment. If it sink into the earth, the soil absorbs all these precious materials, and allows the superfluous water to escape only after having left its contribution in the soil. Besides, if the rain be allowed to run off from the surface, it forms streams and little torrents, and carries with it much of the loose and most valuable portions of the soil. The soil should therefore be kept, for some depth below the surface, so mellow and penetrable, that the rain, instead of running off, shall sink into the ground. In ploughing a side hill, the furrows must run horizontally along the slope, so that each furrow may detain the water as it falls, and prevent its forming gullies, which it will do, if the furrows run up and down the hill. 126. Excess of wet is also sometimes to be feared, especially when the water has no way of running off, but remains stagnant, either beneath or above the surface, for it then causes the plants with which it comes in contact to mould and decay. We must then have recourse to ditching and drainage. 127. Drainage is an operation by which we draw off the superabundant water from the soil and from the earth lying beneath the soil, where it would not otherwise escape. It is eilected by placing lines of porous earthen 42 OP WATER. tubes at a convenient depth, so arranged as to receive the superfluous moisture and carry it off. 128. The effects of drainage may be explained by a comparison. Plants which are kept in flower-pots would soon rot at the root, if the water with which they are watered were left to stagnate in the bottom of the pot without any means of escape. For this reason, the bot tom of the pot has a hole in it, to let the superfluous water run out. Now drainage does the same service for the field that the hole in the bottom does for the earth in the flower-pot. 129. Drainage produces several other effects, three of which are important. (1.) The earth being rendered less moist at the surface, far less evaporation takes place there. Whence, as evaporation always cools the surface very considerably, a drained field keeps in the heat better than one not drained ; and the natural consequence is that the crops ripen earlier. The grain on a drained field is generally fit for the sickle some days, often some weeks, earlier than that on other fields. (2.) Lands well drained and deeply tilled bear the drought better than others. The reason of this seems to be, that the pores are always open in deeply tilled, well-drained land, to an unusual depth. Evaporation cannot reach to a great depth, and, in a season of drought, the open pores allow the moisture which lias been kept in the deep earth to rise by capillary attraction. (3.) Tho subterranean pipes laid in the earth, open the soil to a freer access of air, allowing it, as it were, to breathe, and receive the benefits of being subjected to the action of the air. The soil is thus rendered fit to absorb and retain the nutritious substances brought into it by ADVANTAGES OF THOROUGH DRAINAGE. 43 the rain water, and keep them laid up for the nourish ment of plants. 130. Here then are the advantages of deep and thorough drainage. It deepens the available soil, by removing any superfluous water from the lower portion, and allowing the roots of plants to penetrate freely. It warms the land by diminishing evaporation at the surface. By carrying the redundant moisture readily away at all seasons, it gives the opportunity of early cultivation, thus lengthen ing our short seasons, and of thoroughly mellowing the soil, which cannot be done if it be too wet ; and it entirely avoids the danger of losing the plants on the surface by having them freeze out, as they often do, if water continues to stand on the surface at the approach of very cold weather. It moreover guards plants against the evil consequences of drought. 131. For, in a well-drained soil, the roots will penetrate to a much greater depth than in an ill-drained soil. By draining, only the unnecessary and hurtful moisture is carried away. The soil, if rich, retains very tenaciously all that is necessary, and parts with it very reluctantly and only to the roots of plants. Now roots which have pene trated two or three feet have twice or thrice as large a store of moisture to draw upon, in case of drought, as those which have been prevented from going down more than one foot. In a well drained field, the spring rains, instead of being allowed to run away and be lost, are saved, as in a reservoir, against the heats and drought of summer. 132. A rich soil, rendered deep and mellow by thorough cultivation, and by a system of unclerdraining, is thus the best preventive to the consequences of drought which the farmer can provide, and it is, at the same time, most effectual against the evils of excessive rain. 44 OF PLANTS. CHAPTER VI. OF PLANTS. 133. Though fixed, and incapable of voluntary motion, and differing from animals in structure and organization, plants proceed from other parent plants, and live, are nourished and die, like animals, and, like them, produce offspring similar to themselves. Plants live and grow. Animals live, grow and feel. Vegetable life, therefore, is a very different thing from animal life. 134. The simplest of all plants consist of mere bladders or little round cells. These little cells imbibe their nour ishment, in a fluid state, directly through the thin coat by which they are covered. The fluid within moves around in little curves, and changes at last take place in it, by which other smaller cells are formed. These gradually enlarge and finally burst the covering of the original cell, and become new plants, similar to their mother cell, and grow to the same size. Such arc the simplest of all plants ; and the growth of other plants, even of the highest perfection of structure, takes place by the formation, within the cells already existing, or outside of them, of other cells similar in nature but sometimes differing in shape. 1 '•}'}. Plants, consisting each of a single cell, are found in such numbers as sometimes to give a brilliant red color to whole miles of snow and ice on which they grow. 136. Other plants, almost as simple, are formed of a thread of single cells, strung together, end to end, like a string of beads. Of this structure are many delicate fresh water plants. And it is a plant of this kind which, ORGANS. — ROOT. — STEM. 45 by growing very rapidly through dough, in which its seeds have been sown in the form of yeast, causes an action which makes it swell and form light bread. Other plants are formed of a single thickness of cells arranged side by side and end to end. These also are usually found growing in water. There are still others which consist of a few, often only thrfio or six layers of cells, plants having length and breadth with but little thickness. Such are the lichens which form a thin crust on the bark of trees and on the surface of rocks which have been long exposed to the atmosphere. 137. Most plants are formed of cells growing out of each other in every direction, upwards, forming the stem, downwards, forming the root, and on every side, forming the thickness of root, stem and branches, and leaves and flowers and fruits. 138. The parts just enumerated, the parts of which the plant is made up, are called the Organs. 139. The principal organs are 1st, the root ; 2d, the stem ; 3d, the leaves ; 4th, the flower ; 5th, the fruit. 140. The Root is the part which penetrates from the light into the earth, and gives the plant foothold, and the means of obtaining nourishment. It usually divides into smaller and smaller roots and rootlets, or radicles and fibres, more and more slender, the cells along the sides and extremity of which are the real mouths by which most of the food of the plant enters into its circu lation. The amount of food which a plant can receive from the soil depends upon the number and surface of the fibres of the roots. 141. The Stem is the part of the plant which rises upwards into the air and light, and supports the branches, 46 OF PLANTS. leaves, flowers and fruit. The point at or near the sur face of the earth, where the root and stem join, is called the collar of the plant. 142. The stem and branches are protected from heat and cold by the bark. 143. The Leaves are the organs through which the air, and the light and heat of the sun act upon the sap which comes up into them through the stem. Through their surface the superfluous moisture is evaporated, and oxy gen gas is thrown out into the air, and carbonic acid and other gases for the nourishment of the plant are absorbed. The Sap changed by these actions of the elements, is carried back down into the stem, and converted, by the vital action of the plant, into wood, bark, new branches and leaves, fruits and whatever else is produced by the plant. 144. The Flower is the organ by means of which the seeds are prepared ; and a great object of the plant is the production of fruit containing seeds. 145. By carefully examining a rose, you may see the several parts of which a Flower consists. Outside of the flower leaves is a flower cup or Calyx, of five green leaves, called the calyx leaves or sepals, which cover and protect all the parts of the flower, before they arc ready to open. 146. Inside the calyx are the flower leaves, called Petals, tender, and of a delicate texture and beautiful color. All the petals together arc called the Corolla. 147. Next inside the corolla arc the Stamens, slender threads or filaments, of a pale yellow color, each bearing at its extremity a little sack called an Anther, full of fine dust called pollen. This dust or Pollen is essential to the fecundation of the seeds, that is, !<> their becoming perfect, fertile seeds, fit to produce a plant. FLOWER. — OVARY. — FRUIT. 47 148. Inside the stamens, in the middle of the flower, are the Pistils, each one of which consists of a short column, called a Style, tipped with a very delicate crest called the Stigma, which is usually tender and moist when the flower is in perfection. In a rose the style seems to be nearly wanting, the stigma appearing to rest almost directly upon the receptacle or centre of the flower. But if you cut down directly through the centre of the .flower, you you will find the style somewhat long and connected at the bottom with an ovule. 149. The Pollen or fertilizing dust of the anther falls upon the moist stigma, and penetrates, by means of some thing which looks like a root, to the interior of the base of the style to a cavity called the Ovary, containing ovules, or imperfect, rudimentary seeds. The effect is to fertilize the ovules and make them become real, proper seeds, by producing within them an Embryo, or minute, future plant. 150. "When the seeds are fertilized, the flower begins to fade. Its corolla falls off, its stamens shrivel up, and its calyx usually, but not always, falls or shrinks and disap pears. The ovary swells and becomes the Fruit, which, in process of time, ripens and falls or dries up or decays, according to the kind of plant, and leaves the seeds ready to germinate or sprout, and thus become plants, or to be gathered and sown at the proper season. 151. Whatever contains the seed is properly called the Fruit of a plant. In the case of wheat, rye and some other seeds, each kernel is at the same tune a seed and a fruit/ Usually, however, a fruit contains several or even a large number of seeds. A bean pod or pea pod or a poppy head, is a fruit, as well as an apple, a pear or a melon. 5* 48 OF PLANTS. We may now understand what is meant by organic substances. Plants, as we have just seen, are made up of organs. So are animals. The lungs are the organs of breathing, the stomach is the organ of digestion. All the parts of animals and plants are organized, and the substances which belong or have belonged to animals or plants are called organic. Mineral and all other sub stances aro inorganic. 152. Now observe what happens when the seed is put into the ground. Every seed contains an embryo or minute plant. This, called the sprout, you may easily see in a bean, if you open it carefully. When a seed is put into the earth, in a favorable state of moisture and warmth, it presently begins to sprout or germinate. The sprout breaks through the seed coat, and the future stem shoots upward into the light and air, and the root turns downward from them. 153. As soon as the stem rises above the surface it commonly spreads out two seed leaves, which had been already formed in the seed. These leaves, or Cotyledons, may be always seen in a bean, pea, or apple seed, which has just come up. But none of the grains or grasses have them. The cotyledons arc quite unlike the succeed ing leaves of the plant. It is important to remember this, as we often want to know both cultivated plants and weeds as soon as they are up. 154. Plants which have two seed leaves or cotyledons are called Dycoteledonous (from two Greek words, dis and cotyledon, meaning two-seed-leavcd.) In plants of this kind there appears, between the seed leaves, as soon as the plant is up, a little bud of unopened leaves called 155. The Plumule. This soon begins to stretch upwards, bearing on its summit one or two minute leaves nearly MONOCOTYLEDONS. — PARTS OP A TREE. 49 of the usual shape. These enlarge and expand, and from their axil or inner angle, appear one or two other, ordinary leaves, which, with the new joint of the stem, rise and expand in like manner. 156. But all plants do not have two seed leaves. A kernel of maize or of wheat has only one cotyledon. This is also true of all the grains and grasses and of some other plants. Such plants are named Monocotyledonous Plants, (plants with one seed leaf.) A plant of this kind comes up with one single leaf rolled together, as may be seen in the case of Indian corn or common wheat. When this leaf is somewhat expanded, another leaf appears within it, growing from a second joint in the stem. From each successive joint grows one leaf, till the corn-stalk or grass-stem is complete. 157. The stem of a tree has external and internal organs. The external are the trunk, the boughs, limbs or arms, the branches, the branchlets, the spray, and the shoots or twigs. The trunk is the main body of a tree. It begins at the collar, and, after rising to a greater or lesser height, divides into branches or ramifications. All the divisions, large and small, are called branches or boughs. The largest are called also limbs or arms. A division of a branch is called a branchlet ; and all the smallest divis ions together are called the spray. Shoots or twigs are, properly, those of not over one year's growth. 158. A shoot begins in the spring to grow from a bud at the end of a branch called a terminal bud, or from an axillary bud, or one in the axil of last year's leaf, that is, the angle above the leaf, between it and the stem. 159. The internal organs are the inner bark, in several layers, the alburnum or sap-wood, the heart-wood, the pith, &c. 50 OF PLANTS. ICO. The usual course with plants is to grow up, bear leaves and flowers and finally fruits, and then, if they are plants of a single year, to die ; if plants of two years, to die down to the ground ; if plants of many years, with woody stems, to shed their fruit and leaves, after having formed buds, out of which shall grow the leaves, flowers and fruit of the next year. Those which die at the end of one season, like wheat and Indian corn, are called annual plants. Those that live only two years, like beets, carrots and most other garden vegetables, are biennial; those that live many years, like shrubs and trees, are per ennial plants. 161. It sometimes happens with different kinds of cul tivated grains, and some other plants, that the plant dies and falls before the seed is quite ripe. Foreseeing this, the husbandman reaps or mows grains and grasses before the seed is ripe, dries them in the sun and air, and leaves them, in sheaves or stacks, completely to ripen their seeds. He thus saves many grains and seeds which would other wise fall upon the ground and be lost. 162. As the kinds of plants are almost innumerable, they must be arranged in divisions, classes and families, so that they may be studied and recognized. How are they classed ? All plants with flowers belong to one or the other of the two great classes just now mentioned, Monocotyledonous and Dicotyledonous. 163. Botanists, since the time of Linneus, until recent ly, have followed him in dividing plants into classes and orders, made with reference to the number and situation of the stamens and pistils. This is called the Artificial system of Linneus. 164. Plants are now best divided into natural families, according to the resemblance or analogy of all their organs. NATURAL FAMILIES. — GENUS. — SPECIES. 51 All those which seem to be made upon the same plan, with similar stems, leaves, flowers and fruit, are said to belong to the same Natural Family. Thus all the oaks, chestnuts, beeches, and hazel nuts, belong to the Oak Family, because, while they resemble each other in gene ral appearance, in the structure of their flowers and fruit they are still more strikingly alike. 165. Plants are still farther divided into genera and species. A genus is a subdivision of a family, and a species, a subdivision of a genus. The oak family, for example, is divided into the genera, oak, beech, chestnut, hornbeam, hop-hornbeam and hazel. The genus oak is subdivided into white oak, red, black, post, over-cup, live, willow, and many other species. Speaking of a black oak, we should say ; it belongs to the Class Dicotyledonous Plants, to the Oak Family, to the genus Oak or Quercus, and to the species Black Oak, or Quercus Tinctoria. 166. An example will show of what practical use these divisions and subdivisions are. I find a grass which I suspect to be Common Hair Grass ; I wish to know cer tainly ; and turn to a volume (Gray's Manual of Botany) which contains a description of every plant in New Eng land. The first part of the volume is occupied with dico tyledonous plants. I find the description of monocotyle- donous plants, to which I know grass belongs, beginning on the 426th page. Not desiring to read the whole of 158 pages, I look for the Grass Family, and find it to be the 184th family, and on the 535th page. This family, I find, contains 65 genera. After some examination of a table, I find that the 47th genus of grasses is Hair Grass, (Aira.) Carefully reading the description of the genus, in six lines, and of the first species, (Aira flexuosa,^) in four, I find that the plant I have found belongs to it, and 52 OF PLANTS. is, really, Common Hair Grass. Thus, if I understand the language of botany, I can find, in a few minutes, by means of these divisions and subdivisions, what I should otherwise have to read a volume through to find. Besides, when I have studied one plant of a family and know all about it, I find I thereby already know a good deal about every other plant of the same family. 167. It will be useful to the farmer to know the names of some of the natural families to which the more impor tant cultivated plants belong. All the kinds of pea, bean, tare, vetch, clover, lucerne, &c., with flowers more or less resembling a butterfly, (papilionaceous,) belong to the Pulse Family, pod-bearing or leguminous vegetables. The seeds of all these are nutritious to man, and, with their leaves and stems, are of great value to the domestic animals. 168. The cabbage, turnip, radish, mustard, pepper- grass, water-cress, charlock, &c., belong to the Cress or Cruciferous, (cross-bearing,) Family, so called because their flower-leaves form a cross. To the same belong many plants cultivated for the beauty of their flowers, stock, wall-flower, rocket, sweet alyssum, candy tuft, &c. 169. Flax belongs to the Flax Family, valuable in the arts. 170. The roses, peaches, apricots, plums, cherries, haw thorns, apples, pears, quinces, as well as brambles, straw berries and many other plants, with flowers which are like a little rose, belong to the Rose Family. The fruits of all these plants are wholesome ; many of them, very delicious. 171. Cucumbers, squashes, pumpkins, and melons be long to the Gourd Family, with some exceptions, an inno cent and valuable family. NATURAL FAMILIES. 53 172. Currants and gooseberries, both cultivated and wild, belong to the Currant Family, whose fruits are healthy and often medicinal. 173. The carrot, parsnip, caraway, celery, parsley, coriander and others belong to the Parsley Family, Umbel- liferw, (umbel or umbrella-bearing,) so valuable for their roots or their seeds. 174. The sunflower, Jerusalem artichoke, succory, sal sify, dandelion, lettuce, daisy, mayweed, chamomile, aster, golden-rod, thistle, everlasting, and many others, belong to the Sunflower or Composite Family. 175. Sage, mint, sweet basil, lavender, pennyroyal, balm, catnip, hyssop, summer savory, marjoram, thyme, motherwort, horse-mint, spear-mint, self-heal, and many other herbs, belong to the Sage or Mint Family, friendly, soothing, and pleasant to man. 176. The sweet potato, morning glory, convolvulus, and others, to the Convolvulus Family, a suspected race, whose roots are, notwithstanding, sometimes of great value. 177. The tomato, potato, capsicum, petunia, stramo nium, henbane, tobacco, &c., belong to a very poisonous family, called the Night-shade Family. The root even of the useful potato retains some of the characteristic poison. This poison may always be boiled away. A potato should therefore be so cooked as to be mealy. The waxy appear ance shows that some of the poison is still present. 178. The lilac, privet, fringe-tree and ash belong to the Olive Family. 179. All the whortleberries, blueberries, cranberries, the checkerberry, May flower, Kalrnias or American laurels, azaleas, and many others, belong to the Heath Family. Of these many are wholesome, some doubtful, some poisonous. 54 OP PLANTS. 180. The beet, pigweed, or goosefoot, orache, spinach, ... V. 60 ELEMENTS OP PLANTS. without any immediate connection with the earth, and drink in all their food from the air. 209. The charcoal in plants is never found perfectly pure. Diamond is pure carbon. In plants it is always combined with something else. By charring, that is, exposing wood or other vegetable substance to great heat, out of the reach of the open air, all the atmospheric portions are consumed, or, to speak more properly, turned into vapor and gases, and driven off, and a perfect skeleton of charcoal, showing all the minutest parts of the structure of the plant, is left. 210. In peat, which is the woody substance often found under the surface in swamps, and also in anthracite and bituminous coal, which arc the remains of the vegetation of former ages, every thing in the structure of the plants, of which these substances are formed, is often so com pletely retained, that from them the family, and even the genus and species of the plant may be ascertained. 211. By the process of charring, every thing except the carbon is not consumed. Indeed nothing is consumed ; but those portions capable of assuming a gaseous form are driven off. By carefully burning, in air, the charcoal left, the carbon combines with the oxygen of the air and flies off in the state of invisible carbonic acid, a portion of water which has still adhered to the charcoal is turned into vapor, and a greater or less amount of ashes is left. 212. All those elements which thus assume a gaseous form and fly off into the atmosphere, as smoke, vapor or gas, in these two kinds of burning or combustion, are often called for that reason, the combustible, or, more properly, the atmospheric elements. They are oxygen, hydrogen, carbon, and nitrogen, and their compounds, ASHES. — SULPHUR. — LIME. — PHOSPHORUS. 61 water in the state of vapor, ammonia, carbonic acid and some others. Those that are left in the Ashes arc the incombustible elements, or the mineral elements. In the ashes of every plant is found a very considerable number of mineral constituents. But the ashes of plants of particular families are often remarkable for the amount of particular elements contained in them. 213. The ashes of radishes, mustard, and other plants of the Cruciferous Family, particularly of the seeds, contain Sulphur, or brimstone, in the state of sulphuric acid, combined usually with some other substance. 214. In the ashes of pod-bearing or leguminous plants, such as peas and beans, and other plants of the Pulse Family, particularly clover, sulphuric acid in composition with lime, or Sulphate of Lime, is found. Lime is a compound of a metal called calcium, with oxygen ; so that sulphate of lime is made up of sulphur, oxygen and calcium. It is commonly .called gypsum, or plaster of Paris. 215. In the ashes of kernels of wheat or other grain, as well as of many other kinds of seed, is found a large quantity of a salt called phosphate of lime. This is a compound of lime and phosphoric acid, which is itself composed of oxygen and a very curious substance called Phosphorus. This is a soft, translucent, poisonous solid, looking like wax, turning yellowish when exposed to light, of a peculiar smell, and called phosphorus, (light bearer,) from shining in the dark. It has so violent a tendency to combine with the oxygen of the air, and burn, that it must be kept under water. A very little of it mixed with other substances and applied to the end of a bit of wood, gives that readiness to take fire which belongs to phos- 62 ELEMENTS OF PLANTS. phorus matches, commonly called lucifer or friction matches, which a little rubbing produces heat enough to set on fire. Phosphate of lime is found not only in the seeds of very many plants, especially those of which bread is made, but in all plants, and in the bones of men and other animals, whence it is called bone-earth. 216. The ashes of all kinds of straw and grass, of the bamboo cane, and of the scouring rush, consist, in a very large degree, of silex or silica; and all these plants owe the stiifness and hardness of their stems to the silica contained in them. Silica is oxygen combined with a metal-like substance called silicon. When perfectly pure, silica is a white, gritty powder, without taste or smell. It is the substance of which quartz, rock-crystal and flint are composed. Though wholly unlike, in appearance, to the other acids, it is yet an acid, and combines with the oxides of many of the metals to form silicates, and, in these forms, constitutes a very large portion of all rocks and soils. 217. In the ashes of trees and other woody plants, as well as in most other ashes, potash is found. If wood ashes be leached, that is, if hot water be poured upon them, it will, in a short time, dissolve the potash in the ashes. The dark-colorqd, strong lye, thus obtained, boiled with oil or fat, forms common soft soap. Lye, boiled away, in a pot, without fat, leaves a dirty looking substance called potash. This, when somewhat pimMi'd, is called pcarlash. 218. This common Potash is the carbonate of potassa, ii compound of carbonic acid and potassa, which is, itself, a compound of oxyjren with a metal called potassium. This metal has the lustre of silver, but is soft, and so light ALKALIES. — POTASH. — SODA. 63 as to float on water. So great is the attraction between potassium and oxygen, that it decomposes the water on which it floats, unites with a portion of its oxygen, exhib iting the singular appearance of a little fire on the water, and forms potassa. 219. In the ashes of kelp and of other plants growing in the sea, and of some of those growing near the sea, instead of potash, Soda is found, in the state of carbonate of Sodium, a light metal somewhat similar to potassium, and having nearly the same violent affinity for oxygen, so as to take fire when placed on hot water. 220. Alkali. The ashes of sea plants have long been of value in commerce, from being used in the manufacture of hard soap, and also of glass. These soda ashes are called, in Spain, alkali, (Arabic al, the, kali, ashes,) which name has thus been given to soda, and thence to potash and ammonia, all which are called alkalies ; and all three have very similar properties. They have a bitter, acrid and burning taste, and the power of changing vegetable blue colors to green, and pink to blue. 221. They have also the remarkable property of uniting with the acids, and thereby losing all their own peculiar properties, and destroying those of the acids. Sulphuric acid, for example, has the extreme sourness and corrosive power with the other properties of the acids. Pure soda has the alkaline properties just mentioned. But when sulphuric acid is poured upon soda, it forms a new sub stance, sulphate of soda, or Glauber's salts, which is called a neutral salt ; a salt, because it looks very much like common table salt, and neutral, because it has neither the properties of an acid nor those of an alkali. It is in the state of neutral salts that most of the mineral substances enter into the composition of plants. 64 ELEMENTS OF PLANTS. 222. The ashes of asparagus, and of other plants which grow naturally near the sea, contain a large portion of common salt, in very minute, regular, cubical particles, called crystals. Now salt is composed of a gas called chlorine, and of the metal sodium, and this salt, — common table salt, — is called by the chemists Chloride of Sodium. And it is very remarkable that this pleasant and wholesome article in our food should be composed of a substance so ready to take fire as sodium and another like 223. Chlorine. This is a suffocating and poisonous gas, of a greenish color, whence its name, -(chloros, Greek for green,) which has a great attraction for foul air and for coloring substances, and is therefore employed for disin fecting, or drawing off foul air, and for bleaching, or making things white. 224. Oxides of two other metals, Magnesium and Iron, are also found in the ashes of all plants, but commonly united with some one of the acids. 225. The oxide of magnesium is called Magnesia. It is a white, bitterish substance, resembling flour in appear ance, often used in medicine. 226. Plants growing in the sea, called sea-weeds, such as kelp, oar-weed, rock-weed, y means of these his instructions may be made far more interesting and intelligible than they possibly can be without. For perfect illustration of what is taught in this chapter not more than twenty specimens will be required; and, by means of such a collection, the pupils may easily be induced to make collections for them selves, and to become acquainted with the names and qualities of all the rocks in their neighborhood. SILICA. — SILICIOUS ROCKS. 77 stances mentioned above, are usually combined with it as silicates of potash, silicates of alumina, &c. When found pure, it is called quartz or flint, and in that state is used in the making of glass. It is the most abundant solid constituent of the earth's crust, forming about five-eighths of the substance of the most important rocks. Agate, chalcedony and opal, which are hard and almost precious stones, are nearly pure silica. Though so very hard, it is rendered soluble, and is dissolved by the action of the alcalies and their carbonates. 271. Silica usually occurs as coarse or fine sand, and enters very largely into the composition of the soil of all granitic regions, such as that of the greater part of the New England States. Pure silicious sand is seldom found. It is commonly mixed largely with grains of sand formed by the crumbling of the other ingredients of the rocks. 272. (2.) Silicious Rocks or sand-stones are composed of small grains of silex agglomerated or stuck together, and of various colors, from white to red, according to the proportion of oxide of iron which they contain. When crumbled into loose sand they make the poorest possible soil. A soil formed principally of the sands coming from these two sources, is a loose, light, sandy soil, readily pen etrated by water, but not retaining it long, and therefore liable to be much affected by drought. It is easily culti vated, but not fertile, especially when its principal ingredient is coarse silicious sand. Its fertility and its readiness to retain moisture and manures depend upon its fineness and upon the due admixture of other ingre dients of soil, clay and lime, to be spoken of presently. 273. (3.) 01aty or Argillaceous Rocks are all inore or 78 THE SOIL. less like slate, and, by their crumbling and decomposition, seem to have given rise to clay or argillaceous earth. Clay is silicate of alumina; a chemical compound of silicic acid, alumina, and water. Clay usually contains also silicates of potash, of soda, and of lime. It forms a compact, fatty earth, which is soft to the touch, adheres somewhat closely to the tongue, and exhales a peculiar odor, which is perceived when it or clay-slate is breathed upon. Pure clay is white ; but clay, as ordinarily found, is colored blue, brown or red, by oxides of iron. It absorbs a great deal of water, and parts with it very reluctantly ; and it has a strong attraction for ammonia and for the very richest portions of manure. When completely wet, it becomes a thick paste, almost impenetrable to water and to air, which it prevents from percolating or penetrating farther into the earth. Under the effect of drought, it cracks and becomes excessively hard. From the action of frost, on the contrary, it swells and crumbles into powder, from the water's expanding, as it freezes, and thus breaking up whatever contains it. Hence the usual humidity of clayey lands, the difficulty of ploughing them in a very wet or a very dry season, and the beneficial effects of freezing. 274. There are many kinds of clay, and most of them are of great value in the plastic arts. All the varieties of porcelain, pottery, stone ware, earthen ware, tiles and bricks, arc made wholly or chiefly of clay. The celebrated kaolin, or pure white porcelain clay of China, is mouldered felspar ; and the petuntze of the Chinese potter is another kind of felspar containing potash. Clay is also the mate rial commonly used by the statuary, in which to shape the first draught or model of his figures, and often by the CLAY. — ALUMINUM. — CALCAREOUS ROCKS. 79 architect for the first solid representation of the ornaments of pillars and other parts of buildings. 275. Most of the slates are more or less aluminous. The metal aluminum, which is the basis of clay, very much resembles silver in color, brilliancy and hardness, though far less beautiful. Alum, from which it derives its name, is partly made of it. The oxide, alumina, is one of the most abundant mate rials of the crust of the earth, forming not less than one quarter of its substance. Two of the most beautiful of the precious stones, the sapphire and the ruby, are alumina tinged with a little oxide of iron. They are inferior only to the diamond in hardness and brilliancy. Another very beautiful precious stone, the topaz, is also an aluminous mineral. When colorless, it possesses a lustre which has often caused it to be mistaken for the diamond. 276. (4.) Calcareous Rocks arc composed chiefly of carbonate of lime, that is, lime chemically combined with carbonic acid. There also enters into their composition a greater or less proportion of silex or other sand, and of clay and sometimes other mineral substances. In England and some other countries, vast quantities of chalk, which is carbonate of lime, are found, and in some places the soil is almost wholly made of it. A soil consisting chiefly of calcareous earth is a very poor soil. It has more tenacity than sand, but less than clay, absorbs moisture readily, but easily parts with it, and is liable to crack, when dry, like clay, and to parch plants growing in it. Excessive moisture turns it into a thick mud, and if, in this state, it be exposed to extreme cold, it swells and cracks, and is apt to wound the roots of plants and even throw them out of the ground. In its 8 80 THE SOIL. mechanical properties it is a medium between clay and sand. 277. (5.) Pudding-stone Rocks, sometimes called gray- wacke, are made up of materials formed by the mixture of a great variety of other rocks, -which seem to have been brought together, in very ancient times, by the action of floods or streams of water. They have their name from their resemblance to plum-pudding, the ingredients being of every variety of lime-stone, clay-slate, and porphy ry, greenstone, trap, and every other form of granitic rocks. They are often of a very coarse texture, made up of pieces of stone of every size, sometimes weighing hun dreds of pounds, and sometimes of so fine a texture as to resemble slate. The materials are held together by a natural mortar of lime or of rust of iron, or by mere contact. When com pletely reduced to dust, these rocks make a rich soil, from its containing all the mineral materials, intimately mixed, which are necessary to the fertility of soil. 278. All these rocks, differing in hardness and in other properties, and forming, perhaps, at first, the surface of the earth, have, in process of time, been crumbled, and then, or before, transported to various distances. The sand, coarse or fine, formed by the crumbling of the granitic rocks, sand-stones, and pudding-stones, con tain the six substances enumerated, 209. The slate "rocks form clay; and the chalks and other calcareous rocks, lime. Altogether they furnish all the mineral materials which enter into the structure of plants. 279. How have these rocks been changed into soil? Chiefly by the action of heat, of water, and of cold. The sun's heat warms and expands all the rocks upon which it falls. While they are in this state, the rain, descending, BOCKS CHANGED INTO SOIL. — WEATHERING. 81 penetrates their surface and moistens and softens them. Frost turns this moisture into innumerable little wedges of ice, which split the thin outer coat of the rocks into minute fragments. The hardest rocks are thus gradually crumbled into dust. Besides these agencies, oxygen is constantly acting. So are other gases ; and so are carbonic acid and other acids, and lime, and the salts of potash, and other salts. These are dissolving, disintegrating and crumbling the rocks; and water, in streams and torrents, is constantly rubbing off and dashing together the fragments. All these causes are still and constantly acting, not only upon the surface of the great rocks, but upon the surface of the particles of the soil in the cultivated or unculti vated fields. The ceaseless action of all these and of other forces is called weathering. 280. The important question with the farmer is, Which is the best soil ? Neither of the three kinds of earth spoken of forms by itself a good soil. Indeed, each, by itself, forms a soil absolutely barren. The best natural soil is one formed by the due mixture of all the three, the bad qualities of each being corrected by the good qualities of the others. The chemical analysis of a vast number of soils shows that the most fertile arc those into which these three important classes of elements enter abundantly, but not in equal quantities ; and that the fertility diminishes just in proportion as any one of the three comes near to be exhausted. 281. All the innumerable soils have essentially the same elements. Clay, lime and sand are the basis of all. But soils vary as one or another of these prevails, or as one or another is wanting. 82 THE SOIL. A soil formed by a mixture of clay and sand, in nearly equal proportions, is called a clayey sand or a sandy clay, according as the one or the other predominates. If much more than one-half is clay, we call it a loamy clay. So we call a soil a calcareous clay, or a clayey calcareous soil, as the clay or the lime is the more abundant. 282. It must, however, always be understood, that all these combined, even in the most favorable proportions, are not sufficient to form a good soil. There must be superadded a certain amount of humus, mould or geine. This seems to be at the same time the reservoir, and often, perhaps, the source, of those saline matters and of a large portion of the nitrogenous and carbonaceous substances which are essential to the growth of plants. Humus, or Geine, for both words mean the same thing, is a dark-colored earthy matter, fatty to the feeling, formed from the remains of vegetable substances, and sometimes also animal, in different stages of decomposi tion. It readily attracts and absorbs water and retains it, not only rain water but the vapor of the air. It is the perfection of vegetable earth. Land is considered good arable land, which contains three or four per cent, of it. Soil containing as much as eight per cent, of it, is good garden mould, and with ten per cent, it becomes very rich. 283. It can be very readily ascertained whether there is any humus present, by burning a quantity of the soil upon a red-hot fire-shovel. As the humus calcines and turns into charcoal, it exhales an odor cither like that of burnt horn or feathers, or like that of burning straw. If the smell 1)0 strong of burnt feathers, it indicates a soil rich in the products of decayed animal substance. If the HUMUS A SOURCE AND RESERVOIR OF CARBONIC ACID. 83 only perceptible smell be that of burnt straw, it indicates humus formed from decayed, vegetable substances. 284. Humus is always favorable to vegetation, except when it has been produced by the decay of plants under water, or has been very long lying under water. This is often the case with peat, bog earth or marsh mud. These are almost entirely humus ; but when they have been long beneath the surface of water, they are considered cold, and possess acid properties, which render them unfavorable to the nourishment of plants, until corrected by long exposure to the influences of the atmosphere, and to the alternation of the sun's light and of frost. 285. Humus not only acts as a reservoir of carbonic acid, holding it ready to be given to the roots of plants, but, as it consists mostly of carbon and water, and has an attraction for oxygen, it is constantly receiving oxygen from the air. By the progressive decay thus produced, the vegetable and animal remains are constantly turning into carbonic acid and ammonia, and the ammonia into ammo- niacal salts, thus rendering the soil rich in these precious elements of vegetable food. In soil abundantly supplied with humus or other rich manure, the air is sometimes found to contain four hundred times as much carbonic acid as an equal quantity of the air in the atmosphere. 286. The carbonic acid formed in vegetable soil by the oxygen, not only serves directly as food for plants, but it decomposes the silicates and thus sets the potash and other salts free to be dissolved by water and taken up by the roots. Another portion of the oxygen absorbed, combines with the hydrogen of the humus, and produces water. This is a very valuable property, especially in dry seasons, and is one reason why soils abundantly supplied with humus suffer so little from drought. 8* 84 THE SOIL. 287. Another most important property, and essential to the fertility of soil, is the power of absorbing moisture from the atmosphere. During the night, soils which possess this property in a sufficient degree arc enabled to con dense a large quantity of water, and thus make up, in a very considerable measure, for the enormous quantity lost by evaporation during the day. These powers of absorbing oxygen, of absorbing and retaining moisture, and of forming water, are given to a sandy soil by humus, and also by clay, but far more effectually by the two mixed together. 288. The richest natural soils are those which contain all these ingredients, sand, clay, lime and humus in due propor tions. Such are the alluvial soils found on the low banks of the Connecticut and many other rivers. These streams, in their course from their sources in the hills, wash against and wear away a great variety of rocks, dissolve and carry along with them portions that have been made soluble by the processes of weathering, and take up quantities of leaf and other vegetable mould, and bring them all away in their current. When, in the winter and spring, they overflow their banks, they deposit all these mingled materials upon the intervale or bottom lands, — the low grounds lying between the river and the hills. In the lower part of a river's course, these various materials arc deposited in the state of the finest sand or clayey mud ; soils so formed are found to possess an almost inexhaustible fertility. They unite all the materials neces sary for the growth of plants, clay, sand, lime and humus, in circumstances the most favorable, all perfectly mixed, and all reduced to the state of the finest powder. 289. Next in value to these soils, for permanent culti vation, are the light sandy soils formed by the crumbling QUARTZ, FELSPAR, MICA, HORNBLENDE, AUGITE. 85 of the granitic rocks. They contain, in inexhaustible abundance, all the mineral elements necessary to the growth of a plant, potash, soda, lime, magnesia, iron and manganese, in the condition of silicates. 290. The following table will show this to be true. Remember that granite, gneiss and mica slate, are com posed of mica, quartz, and felspar; syenite, of quartz, felspar and hornblende ; trap-rock, of augite, felspar and hornblende ; greenstone, of felspar and hornblende ; and porphyry, almost entirely of felspar. In one hundred parts, there arc, in these .different minerals, about these proportions. For great exactness, see Dana's Manual. Silica. Alumina. Potash. Magnesia. Iron. Lime. In Quartz, . . •- . 100. Felspar, . \ . 67. 19. 14. Mica, . ; . 46. 14. 10. 10. 20. Hornblende, . . 59. 20. 7. 14. Augite, ... 53. 8. 17. 22. 291. Quartz is silica nearly pure. Felspar is a silicate of alumina and potash. Mica is a silicate of alumina and potash, and of magnesia and iron. Hornblende is made of silicates of magnesia and lime, with iron ; and augite, of silicates of lime and magnesia, with a larger propor tion of iron. In some kinds of felspar soda takes the place of potash. 292. How is a light, sandy soil, possessing the mineral elements of fertility, to be managed, that it may become fertile ? The first thing to be done is to render it capable of absorbing moisture, carbonic acid, oxygen, and ammo nia, and of retaining them so as to give them out to the roots of plants as they are wanted. This is done by mixing with it clay, which has these properties in a very considerable degree. 86 THE SOIL. It not unfrequently happens that an abundance of clay is to be found lying underneath the sand at no great dis tance below the surface. .When this is the case, clay is to be dug up and allowed to remain in small ridges, so as to be exposed to the sunlight, the air, the rain, and the cold of winter. After having been so exposed, for a year or longer, it is ready to be scattered upon the surface of the sandy land, or to be ploughed into it. The good qualities of the land will thus be permanently improved. It will be able to absorb and will become retentive of moisture, carbonic acid, and ammonia, and of all the manures. Such an addition may be called an amend ment. 293. Another, and, after the clay, a still more effectual way of rendering a sandy soil fertile, is the application of large quantities of marsh mud, peat or swamp muck. There are often, in the immediate neighborhood of sandy fields, old mud holes, bogs, or swamps, where vegetable substance, — humus, — hasbeen accumulating for centuries. This, by itself, is of no value. But when spread upon the land, and acted upon by the atmosphere, it immedi ately begins to act upon the silicates. " The very act of exposure of this swamp muck has. caused an evolution of carbonic acid gas. Tliat decom poses the silicates of potash in the sand ; that potash con verts the insoluble into soluble manure, and lo ! a crop. That growing crop adds its power to the geine." By such processes, repeated from year to year, " it is not to be doubted, that every inch of every sandy knoll, on every farm, may be changed into a soil, in thirteen years, of half that number of inches of good mould. "* * Dana's Muck Manual. LAND ENRICHED BY CLOVER. 87 And if this can be done with the barren sandy knolls, how much more with the plains ! 294. Where neither clay nor marsh mud is to be easily obtained, light, sandy land may sometimes be ren dered capable of absorbing and retaining the atmospheric elements of vegetable food and thus becoming fertile, by scattering plaster upon it and sowing clover seed. When the crop of clover, together with the weeds which will spring up with it, is in perfection, that is, nearly or quite ripe, it may be ploughed in. This process, though seem ingly a waste of good clover hay, is one by which many poor lands may be rendered fertile and afterwards kept so by careful cultivation. 295. If it be objected that all these amendments re quire a good deal of time and labor, it may be answered, that there are days in the year when a farmer can spare both . and that a permanent improvement of land is worth a good deal of both. There are no gains without pains. Clay may be brought from a clay pit or muck from a bog at seasons of the year when no agricultural operation can go on. 296. A Clayey Soil is to be improved first by the appli- ^ cation of sand, as fine as can be found, in quantities proportioned to the hardness and closeness of the clay. The object is to bring it into such a state as shall allow water to penetrate freely, and that it shall harden and crack less under the influence of drought. If applied to the surface, the sand will exert at once a favorable influ ence there, and will soon find its way down into the clay, when another layer may be applied. This may be done as well in the heart of winter as at any other season. The sand not only improves the texture of the soil, but the reciprocal action of the clay and the sand, aided as it 88 THE SOIL. will be by any manure that may be applied and by the vital power of the growing plants, supplies new materials for their food. A clayey soil is always greatly improved by deep drain ing. 297. A limestone or Calcareous Soil, in which there is a deficiency of sand or of clay, may be amended by the application of each, according to the means within reach. A valuable addition to a calcareous soil is the sandy mud found in the bed of a stream, which may often be easily obtained in the dryest part of summer. 298. A fourth kind of soil, naturally unproductive of valuable plants, is that of marshes and swamps. Unpro ductive as such soils are, they are mines of vegetable wealth, as they always contain an abundance of substance produced by the decay of vegetable and animal matters, — of the richest humus. They are to be wisely husbanded. They often contain, in a single acre, enough of the organic elements of fer tility to convert forty acres of hungry, barren land into fertile soil. This mine should not be covered over and lost, as it often is, by burying it under a coat of sand. If a farmer has many acres of swamp or marsh, he may bring a portion of it into immediate fertility by an exchange with the dry and sandy hills of the neighbor hood, — a load of sand for the surface of the swamp for a load of muck for the surface of the hill, — but he ought to leave always a part of his mine accessible, at every season of the year, and continue to draw from it as long as he has an acre of poor sandy land left. :M»(.i. The soil formed from the swamp, by draining and cove riii1.!' with sand, may be, greatly benefited by the application oi' lime, gua.no and other heating manures. COLD SOILS. — WARM SOILS. — COLOR. 89 300. Soils iii which clay predominates are usually heavy, stiff, wet and cold, and difficult to cultivate. But, when well drained, amended by the application of sand and of humus, and carefully tilled, they produce abun dantly, and repay the pains and expense which have been bestowed. Wet lands are cold because of the continual evapora tion of the water at the surface. Every one knows that when a wet hand or face is exposed to the wind, it feels cool. As the moisture is converted into vapor, it takes up heat, and gives to the surface a sensation of coolness. In the same way evaporation renders the surface of a wet soil constantly cool. 801. But lands commonly dry are on that account warm. Sandy land retains heat far better than clayey or peaty land. Color also has an important influence. Dark-colored soils absorb heat, while light colored soils readily reflect it. Most manures arc dark-colored. Rich soils, there fore, naturally absorb heat, and rich sandy soils retain it, better than poor ones. That color has an effect upon the power of absorbing heat is proved by Dr. Franklin's experiment. Place black, blue, red and white pieces of cloth on the snow in the sunshine, and, after some hours, the sun's heat will have been so abundantly absorbed by the black, that it will have sunk into the snow before the white has begun to grow warm, while the red will be just beginning to sink and the blue will have sunk almost as far as the black. 302. There are few places in this part of the country where the soil has been formed by the crumbling of the rocks just beneath the surface. In most parts of the 90 THE SOIL. Northern and Middle States, the soil is made up, in a considerable degree, sometimes wholly, of sands or clays, drifted from the north. These are often called diluvial soils, from a belief, once in vogue, that they had been brought to the places where they are found by the action of a deluge (diluvium.) 303. When the native forests are cut down, and the land cleared of the undergrowth, and broken up by the plough, the soil is almost uniformly found to be fertile. In most parts of America, this virgin soil will bear large crops of grain and other valuable plants, for many years in succession, without manure. This fertility is owing to the fact that the surface has been occupied by forest trees and other forest plants for countless centuries. By the decay of the leaves, fruit, roots and trunks, the ground has been covered with a coat of humus or forest mould ; and by weathering, — the long continued action of the atmosphere, and other great agencies of nature, — the minerals in the soil have been brought into a state suitable for the food of plants. 304. To give some instances of this action. The oxygen of the air, combining with the iron or oxide of iron in a particle of granite, makes it swell and crumble, and, at the same time, releases the potash or other element which had been associated with the iron, and leaves it ready to be taken up by the roots of a plant. Carbonic acid acts in a similar way iipon lime and magnesia. 305. But the carbonic acid docs not act alone. Car bonic acid is always ready to be dissolved or absorbed by water ; and water, thus charged with it, has not only the power of dissolving limestone and magnesian rocks, but exerts a slmv but certain inlluenee by which even granite and the other hardest rocks are gradually crumbled ; very ACTION OF CARBONIC ACID. — EXHAUSTED SOILS. 91 few minerals, perhaps none, being able to resist its long- continued action ; and though its solvent power seems to be slight, in the lapse of time it produces changes of great importance and extent. 806. Carbonic acid acts in other ways. It unites with the ammonia of the atmosphere, forming carbonate of ammonia, and with the potash and soda in the earth, forming carbonates of potash and of soda. These three alkaline carbonates have the power of dissolving silica. Now it has just been stated that silica enters as an ingre dient into the composition of nearly all the harder rocks. Of the three minerals of which granite is composed, quartz is almost pure silica ; mica is two thirds silica, and felspar is about one half made up of silica. All these minerals and many others are thus gradually disinte grated by the slow action of these carbonates upon the silica in them. 307. Why does the fertility cease ? The mineral and atmospheric elements of the food of plants arc gradually taken up by successive crops, and carried off with them, the humus grows thin and meagre, and the soil is ex hausted. The crops obtained from the land are, year after year, continually smaller, till at last they are not sufficient to reward the labors of the husbandman. 308. The obvious remedy is to restore to the soil the elements wanting, as will be shown in the chapter upon manures. 309. But if a soil be barren for one plant, it is not necessarily so for every other. A field which, for want of soluble silica, will not bear a second crop of Indian corn, may, from having a plenty of potash and lime in it, bear an excellent crop of clover or of beets or carrots. There may not be enough of a particular element for one 92 OP THE SUBSOIL. kind of plant, while a plant of another kind may find a quantity of food amply sufficient for its perfect develop ment. A third sort of plant may thrive upon the same soil, after the second, if the remaining mineral constitu ents are sufficient for a crop of it. And if, during the cultivation of these crops, a new quantity of the sub stance wanting for the first, for instance, of soluble silica for Indian corn, has been rendered available by weather ing, then, if the other elements be found in sufficient quantity, the first crop may be again grown upon the same land. CHAPTER X. OF THE SUBSOIL. 310. Immediately below the soil lies the subsoil. It may be and often is composed of the same kind of earth as the proper soil ; or it may be entirely different. A sandy soil may rest upon a subsoil of clay, or upon cal careous rock, or rock of any other kind, or upon gravel. 311. The influence of the subsoil upon vegetation is often very great, especially when the soil is not deep enough for the free growth of the roots of the plants cul tivated. In that case, when the subsoil is of such a nature as to admit of it, the soil should be deepened by ploughing. This should be done gradually and with judgment, because, as the subsoil has no mould or loam in it? turning too much of it up to the surface at once, AN IMPERMEABLE SUBSOIL. 93 will be very likely to render the soil poorer for some time, instead of richer. If a farmer is aware that his soil would be improved by being deeper, he must make the improvement by adding to its depth a little each year. 312. When a loose sand rests upon clay ; or a clayey soil upon calcareous marl, or upon sand ; indeed when ever the subsoil will serve as an amendment to the soil, the two may be mixed with great advantage. The evils of a subsoil impermeable to water are the stagnation of water and the excessive humidity of the soil. Generally, a very slight declivity is sufficient to induce the water to trickle along below the soil upon the surface of the subsoil, until it finds some means of escape. But even in this case, there is likely to remain in the soil superfluous moisture, which ought to be carried away by draining. 313. When the slope is not sufficient to lead the water to run off, the ground becomes boggy and the evil is declared by signs intelligible to every-body, by the spring ing up of rushes, sedges and other bog plants. But when the slope allows the water to trickle away slowly, the evil is not so apparent. The most certain sign, per haps, is the presence of the weeds called horsetail, and scouring rush, (species of equisetum^) which need a sub soil always wet for their horizontal roots to run upon. It may be laid down as a rule that wherever horsetail appears, the ground needs draining. \' I J Jit AH i .\ J V . A,. 94 OF AMENDMENTS. CHAPTER XI. OF AMENDMENTS. 314. The soil plays, in tlic life of plants, a double part. It serves to give room and foothold to the roots ; and it furnishes or keeps in store for plants the elements nec essary for their nourishment. The qualities a soil ought to have, to give sufficient foothold, must vary with the plants. The grains need a somewhat compact soil to give firmness of foothold ; the different kinds of clover a deeper one. On the whole, what is best suited to plants is average qualities, a soil neither too compact nor too mellow, neither too heavy nor too light, too wet nor too dry. 315. These evils are remedied by Amendments, that is, operations, or the use of substances, by which the soil will be improved in its physical qualities. For example, increasing the humidity of dry soils, diminishing that of moist soils, increasing the tenacity of light soils, lessen ing that of heavy soils, or any other changes in the mechanical or physical properties, would properly be called amendments. 316. Argillaceous soils niay be improved by the addi tion, not only of sand, but of gravel, broken brick and plaster, in short by any thing which will render them more open, loose and penetrable by air and water. In England, clayey land is often much improved by burning over the surface, or by burning a portion of the clay and scattering it upon the land. By burning, the clay changes its properties and becomes more like sand, and in this state loosens the soil. IRRIGATION. — PLANTING. — COST. 95 317. The amendments suited to light, dry, siliceous lands, are clay, as already suggested, to give them cohe sion, and argillaceous marls, whenever they are to be had. Irrigation not only gives moisture to a dry soil, but always brings useful additions in the substances which have been dissolved in the water and are deposited when the water is at rest. 318. Planting with trees, especially planting dry, barren hills with forest trees, permanently increases the moisture, not only of the surface covered by the trees, but of the neighborhood, and thus improves the climate. Draining is a valuable amendment. 319. In reference to a proposed amendment, the ex pense must be calculated, and the question must be settled whether the increased produce will pay for the outlay. When the materials are near at hand and it will cost little to get them and transport them, the question is easily settled. 320. The character of the amendment must also be considered. A sandy soil amended by the addition of clay becomes permanently better. The clay can never be exhausted, and will always give to the soil the power of absorbing and retaining the elements of the food of plants. An amendment produced by the introduction of humus or any form of carbonaceous matter will give value to the land, as long as it continues to be well cultivated and manured, but, like manure, the added matter is liable to be exhausted. The quantity to be used will vary with the depth of ploughing. 9* 96 OF FERTILIZERS. CHAPTER XII. OF FERTILIZERS. 321. The soil ought to contain all the elements neces sary to the nourishment of plants. These have already been spoken of in the chapter upon the various elementary substances found in plants. They are : 1, oxygen ; 2, carbon, in the state of carbonic acid ; 3, hydrogen ; 4, nitrogen, in the shape of ammonia ; 5, silicon ; 6, sulphur, and 7, phosphorus ; 8, chlorine, and 9, sodium, in the shape of common salt; 10, calcium; 11, potassium; 12, magnesium ; 13, iron ; 14, manganesium. It must also contain 15, aluminum, as the basis of clay, and, though in minute quantity, 16, fluorine ; and the water or the soil must contain for certain marine plants, 17, iodine, and 18, bromine. 322. These, except the first four, atmospheric elements, are always found in combination, as silicates, sulphates, nitrates, phosphates, carbonates and fluates, of potash, soda, lime, magnesia, iron, manganese and alumina, or in other forms sometimes more complex. We know that these are all essential to plants, because we find them all in the ashes of plants. If any one of these elements were absolutely wanting in a soil, the plants to which that element was essential could do little more than sprout there ; and if planted or sown in such a soil, would starve to death. Plaster, for example, is essential to clover ; and clover seed, sown in a soil which contained no plaster, would not coino up. If there were a very little plaster in the soil, the clover might come up, but would not flourish. HUMUS ESSENTIAL AND TO BE SUPPLIED. 97 323. What is the remedy ? Plainly it is, to add to the soil the element or elements wanting ; that is, to apply manure to the soil. 324. It might naturally be thought that, inasmuch as the atmospheric elements are furnished continually by the atmosphere, it could not be necessary to supply the soil with substances intended to furnish them. But then it must be remembered that the atmospheric elements are furnished very slowly, and it is always desirable to hasten the processes of vegetation, in our short seasons. It is therefore reasonable, and the experience of all agricultu rists, in all temperate countries, shows it to be wise, to provide an abundant supply of those substances which are full of these atmospheric elements, or which serve to attract them and keep them in reserve for the wants of the growing plants. 325. To the question, therefore, Is nothing ever to be supplied to the soil but the mineral elements which are wanting ? the answer is to be given, whenever humus is not already abundant in the soil, it is to be supplied. For humus furnishes directly, and also indirectly, by the changes that are going 011 in it from the action of the oxygen of the atmosphere and the vital power of plants, the carbonic acid, ammonia and nitric acid which are just as essential as the mineral elements. 326. But how arc wild plants supplied with humus ? By a process vastly too slow to meet the wants of the hus bandman. The roots and leaves of the plants that have died, decay and form humus for those which are to suc ceed. But the supply is usually very scanty, and wild plants have often a thin, meagre look, in comparison with those under cultivation ; as, for example, the slender- rooted wild carrot, when compared with the carrot of the 98 OP FERTILIZERS. garden. Prof. Nuttall, who brought to this country many beautiful wild plants from Oregon, often said that when he saw them in the gardens of those to whom he had sent them, he could hardly recognize them, so much had they been improved in size and vigor by cultivation. 827. But humus is slowly prepared by the wild plants themselves. The lichen which encrusts the surface of a rock has no humus to begin to live on. It seems to have the power of eating into the rock itself and of extracting thence the mineral elements it needs. From the air and the rain it gets carbonic acid and ammonia, and, when it dies, deposits on the rock a thin coat of humus fitted for the partial nourishment of other generations of lichens. These are succeeded, after many years, by plants some what more fleshy, like the mosses; and by the grasses and other slender, longer rooted plants ; and these by plants still larger ; till, in the slow process of time, substance enough is gathered to give foothold to shrubs, and finally to trees. 328. The trees of the forest, by their annual deposit of leaves and, from time to time, of fruits, and at last by the fall and decay of their trunks, prepare a deep bed of humus or forest mould for the use of the husbandman. Whenever he can, he avails himself of this treasure. But where it is wanting or scanty, cultivated plants are to be furnished with the abundant humus which they need, by placing in the soil, within reach of their roots, organic, that is to say, vegetable and animal substances, in the state of decay. 329. How these act has already been shown. They pos sess themselves and impart to the soil the power of absorb- in.tr and retaining, for the use of plants, the water and witli it the carbonic acid, ammonia, oxygen, nitric acid CLASSIFICATION OF FERTILIZERS. 99 and other elements which come down dissolved in the rain. These, acting on each other, and quickened in their action by the air, by the sun's light and heat, and by the electric and vital influences of the plants, continually prepare for the use of plants, the food which they need, in the form best suited to their nourishment. 830. To the question, Which are more important, the atmospheric elements thus furnished, or the earthy or mineral ? we answer, Both are equally important. Both are indispensable. They are necessary to each other. A soil rich in organic substances, attracts and retains the atmospheric elements in abundance proportioned to its richness. Such a soil puts the earthy elements into a condition suited to the wants of vegetation ; and, the more readily and abundantly, in proportion to the fulness of the supply of these earthy elements. 331. Fertilizers may accordingly be divided into two great classes, viz. : Inorganic or Mineral Fertilizers, and Organic, or Vegetable and Animal Manures, OF INORGANIC OR MINERAL FERTILIZERS. 332. In their general character, inorganic fertilizers are both manures and amendments. They furnish nour ishment to plants, at the same time that they exert a mechanical action upon the texture of the soil, upon its lightness, stiffness, compactness, &c. 333. The principal mineral fertilizers are lime, marl, plaster, wood ashes, ley, soot, sulphates and other salts of ammonia, phosphates and super-phosphates of lime, common salt, carbonates, nitrates, silicates of potash and soda, sulphates of soda, of lime, and of magnesia, &c. But all of these are not in common use. 100 OF FERTILIZERS. 334. Quicklime is limestone, chalk, or shells, deprived of their carbonic acid by heat in a fire or a lime-kiln. Quicklime amends a soil by decomposing some of its ingredients, and by setting at liberty the potash and other alkalies which exist in combination with clay and in par ticles of granitic sand. It also hastens the decay of organic substances, and combines with some of the gas eous products given out during the process. It should be in a state of powder, before it is scattered upon the soil. It combines with the carbonic acid which is always in the air and constantly brought down by rain, and thus returns to the state of carbonate of lime. This, by itself, is insoluble in water, but water contain ing carbonic acid has the power of dissolving carbonate of lime, and thus the carbonate so formed and that already in the limestone rocks are dissolved, and the rocks are disintegrated. It also acts upon plants by diminishing the evaporation from their surface, and thus husbands the moisture in the soil, and makes it last longer than it would without the lime. This same effect is also produced by gypsum, nitre, common salt, and most of the other saline manures. 335. An excellent way of using lime is in a compost, as is practiced in Flanders. Make a layer of lime, and cover it with a layer of sods, weeds, scrapings of ditches and roads, river mud, marsh mud, and any thing else rich in organic substances. Follow with successive layers of lime and of the organic matter, and cover with a coat of loam. At the end of a fortnight, it may be worked over, and this may be repeated, from time to time. The longer it remains in a heap, the more complete is the mixture, in id the better the compost. LIME. — MARL. 101 336. Lime mellows clayey land. It is an essential element in most plants and is valuable therefore for itself. It is a very important element in toba,cco, pota toes, pease, the clovers, and turnips. It corrects the acidity of soils, particularly of that of bogs and swamps. An examination of the mineral ingredients of our soils shows that it is never wanting. 337. Yet, in most parts of New England, it is so diffi cult to obtain and so dear that it cannot often be largely applied. In small quantities, it produces, when needed, most important effects. In England, large quantities are often applied to land in the shape of chalk. 338. Limestone rocks often contain magnesia, which is acted upon in a lime-kiln just as lime is. This dimin ishes the value of the lime, as does the mixture of clay and of sand, with which it is sometimes adulterated. Wherever oyster shells or any other shells can be readily got, they may be burned on heaps of brush, or other fuel of little value, and will be converted into a lime which is of greater value for agricultural purposes, than that formed from limestone rocks, because it contains a small quantity of phosphoric acid. The having already formed a part of an organized being seems also to prepare it for a similar service. 339. Marl is a mixture of lime and clay, or lime and sand, sometimes, but not often, found in New England, but abundant in some other States. When exposed to the atmosphere, it should crumble easily, as its action is in proportion to its readiness to mix perfectly with the soil. Though less energetic, it has all the permanent effects of lime, and is very valuable as an amendment, clayey marl to sandy soils, and sandy marl to clayey. 102 OF FERTILIZERS. 340. Plaster, or plaster of Paris, as it is often called, is sulphate of lime : and the valuable effects it produces upon soils are owing to its supplying them not only with lime, but with the very important and often essential element of sulphur. 341. Sulphur, or brimstone, is present in nearly all parts of vegetables and of animals. Mustard seeds and the seeds of all other cruciferous plants contain a large proportion of sulphur. It also exists in the white of eggs, in the curd of milk, in hair and in wool. Several very valuable salts are formed by sulphuric acid or oil of vitriol. By combining with potash, it forms sul phate of potash ; with soda, sulphate of soda, — Glauber's salt ; with lime, sulphate of lime, — plaster or gypsum ; with magnesia, sulphate of magnesia, — Epsom salts ; with alumina, sulphate of alumina ; with oxide of iron, sul phate of iron, — copperas. And it is from these and other similar compounds that plants derive the sulphur found in them. 342. Plaster produces a striking effect upon the water in which it is dissolved, " such water, being incapable of cooking vegetables and of dissolving soap, is called hard water; but it may be very easily and economically con verted into soft ivatcr, and rendered fit for domestic and culinary purposes, by adding to it a small quantity of ordinary carbonate of soda, in the proportion of about half an ounce per gallon." — Normandy. Carbonate of lime is formed, which settles to the bot tom as a white sediment, from which soft water may be poured off. 343. Plaster has also the property of being decomposed by the carbonate of ammonia. It is thus turned into sulphate of ammonia, which is not volatile at a common PLASTER OF PARIS. — ITS ACTION. 103 temperature, and so husbands the ammonia for the future use of plants. This takes place because ammonia and sulphuric acid have a greater mutual attraction than ammonia and carbonic acid. The ammonia, therefore, leaves the carbonic acid with which it has been united, and unites with sulphuric acid, to form sulphate of ammonia ; and the lime, deprived of the sulphuric acid, unites with carbonic acid, to form carbonate of lime. This is more clearly shown by the following diagram : — SULPHATE ( Sulphuric Acid, Sulphate of Ammonia. OF LIME. (Lime, CARBONATE ( Ammonia, . . . . • OF < AMMONIA. ( Carbonic Acid, Carbonate of Lime. 344. The carbonate of ammonia comes from the air, in which it is formed by the combination of the carbonic acid always floating there, with the ammonia always form ing by the union of hydrogon and nitrogen. Or it may be formed in the earth. 345. But when and how should plaster be applied? When a soil does not contain naturally any sulphate of lime, or when it has been exhausted by cropping, the addition of that substance may prove of great value in two ways ; 1st, by furnishing food for the plants men tioned, and 2d, by fixing the ammonia of the atmosphere and laying it up in store for the future use of plants by decomposing, as shown above, the carbonate of ammonia contained in rain water, and making soluble sulphate of ammonia and carbonate of lime. When applied, plaster should be scattered, in the shape of the finest, impalpable powder, in the spring, just as vegetation is beginning, while the dew of the morning or 10 104 OF FERTILIZERS. evening is on the plants, that it may stick, but not in rainy weather. 346. The other sulphates are also useful. Sulphate of soda is said to produce good effects upon clover and other green crops. And so also is sulphate of magnesia good for these crops and for potatoes. 347. Ashes. In Westphalia there is a proverb that " he pays double who buys no ashes." It is a fact often observed that, on strewing wood ashes on a meadow which has long been mown, thousands of clover plants make their appearance, where none were visible before. Ashes are made up of salts, such as silicates, phos phates, sulphates and carbonates. The carbonates and sulphates of potash and soda, as found in ashes, are soluble and are dissolved out by leaching. The silicates, phosphates and carbonates of lime, magnesia, iron and manganese, are insoluble and thus remain in leached ashes. A portion also of silicate of potash remains undis- solved. Far the larger part of leached ashes is carbonate of lime. The next is phosphate of lime or bone dust. 248. Unleached wood ashes are of great value in the cultivation of many crops, especially Indian corn, turnips, beets and potatoes, because of the great amount of car bonate and other salts of potash which they contain, and so important is potash to these plants that they are often called potash plants. 349. Leached ashes are of less general value, but still are a very valuable fertilizer, by reason of the salts which they contain, which, though not soluble in simple \valrr, may be rendered soluble by the influence of other salts, of air, and of the vital power of plants, and may be thus again taken up into the circulation, and again perform ASHES. — LEY. — SOOT. 105 the service they had already performed in the plants from the combustion of which they came. They have important effects when mixed in compost heaps. 350. The ashes of sea coal and anthracite are not with out value, and have a good effect upon cold, stiff soils, and are found an excellent top-dressing for grass, even 011 light soils. As they absorb water and the gases, they are deo dorizers, and retain the offensive gases for the food of plants. They have a slow but good effect, scattered among trees, and are particularly valuable in the forma tion of walks and roads. 351. Since ashes lose some of their good qualities by having ley drawn from them by leaching, Ley itself must be useful as a manure ; and not only ley, but that which is left after the ley has been made into soap by combining with fats and oils, and done its office as soap by taking dirt from clothes, dishes, faces and hands. Soap suds and dish water, therefore, are so valuable that they ought never to be lost or thrown away. They have an excellent effect if sprinkled upon grass or other growing crops, or poured upon compost heaps. 352. Soot is a precious manure, since it is made up of carbon, in the state of the finest powder, and is full of volatile salts. In Flanders, it is reserved for beds of colza, which it protects against plant lice. In England, it is scattered upon meadows, where it promotes, the vegeta tion of grass, while it destroys moss. Three large crops of clover have been got in one year by the use of it. The soot from bituminous coal is still better than that from wood. 353. As Carbonate of Potash and Carbonate of Soda are the forms in which potash and soda are found in ashes, 106 OF FERTILIZERS. they must have the same effects as ashes, only in a more decided manner. 35-1. The salts of ammonia, especially the nitrate, are very valuable as manures, and are particularly applicable to soils already rich in phosphates, or which contain vege table acids. Sulphate of Ammonia, which may be obtained at a moderate price at the manufactories of gas, is excel lent, when applied in small quantities, to fields of meadow hay or of wheat. 355. Nitrate of Potash, East India saltpetre, is nitric acid and potash united. As might be expected, botli nitrate of potash and Nitrate of Soda, South American saltpetre, yielding not only nitrogen but potash and soda to plants, are particularly beneficial to wheat and to barley. 356. And, as the plants grown in the fields must supply the phosphate of lime which is essential to the growth of the bones of all animals, and this ingredient in soil is likely to be exhausted, Phosphate and Super-phosphate of Lime are of the very greatest value as manures. Phosphate of lime is usually applied in the shape of ground bones, and super-phosphate, as bones dissolved by sulphuric acid and diluted with water, applied either in a liquid state, or reduced to powder .by drying. 357. All the elements in the salts of ammonia, of potash and of lime,- here spoken of, are either taken up by plants, or exert a most important influence upon the humus in the soil, hastening the process of decay, and converting insoluble into soluble salts. 358. Common salt is also sometimes of great value as ;L i'ertili/er. For some plants, asparagus, for example, it is of indisputable importance, and may be employed in very large quantities. It not only enriches the soil for COMMON SALT. — OBJECT OF MANURES. 107 asparagus, but it kills nearly all the weeds ; and as weeds are commonly nothing but valuable plants out of place, it must be used with discretion, or it may do more harm than good. Applied in small quantities, it has the effect of render ing grass and clover more pleasant to animals, and, in a small proportion, it is of the greatest value to all cultivated crops. It is also a valuable addition to the farmyard and to the compost heap. Salt which has been used in curing fish or meats is much cheaper and far better than pure salt. 359. The object of manures is to give to the soil what ever is wholly or partly wanting to it, whether of a com bustible or an incombustible nature. The use of organic manures is to furnish the soil with humus, geine or mould, which shall serve as a reservoir, to hold in readi ness, for the use of plants, all the kinds of food necessary to their growth. And the use of humus is to furnish and keep a ready supply of carbonic acid, ammonia and water, which three are the last result of the decomposition of vegetable substances. 360. Such being the object, organic manures should be employed in a condition favorable to decomposition, either in a fermented state or, better still, ready to enter into fermentation. Manures which should refuse to decom pose would be of no use. But the decomposition must not be too far advanced. Ammonia is very volatile, as its common name indicates, and may readily escape into the air and be lost. The penetrating, characteristic odor of ammonia is perceived in stables, near manure heaps, and wherever else nitrogenous substances, that is, vege table and animal substances containing nitrogen, are in a state of decay. Every one who has had occasion to use 10* 108 OF FERTILIZERS. a smelling bottle, knows the effect of ammonia upon the organs of smell. When the manure is immediately covered up, the ammonia, as it is disengaged, is kept in the soil, espe cially if there be clay or loam or something else present which has an attraction for it. 361. Organic Manures are divided into Vegetable Ma nures, Animal ^lanures, and Mixtures of Vegetable and Animal. The principal vegetable manures are green crops, kelp and rock-weeds, straw, sedge or reeds, leaves, brewer's grains, &c. 362. Green Manures are standing crops, ploughed in, if possible, when ripe, for it is then that they contain the greatest quantity of soluble matter. The best plants for the purpose are the different kinds of clover, lucerne and sainfoin, vetches, buckwheat, cabbage-leaves, radishes, turnip-tops, wild mustard and wild turnip, potato-tops, Indian corn, rye, i f PREPARATION OF LANDS. \ I < I F( ) f / v j CHAPTER XIV. PREPARATION OF LANDS. 415. A texture or mechanical condition of the soil favorable to plant growth is especially necessary. The mechanical condition of the soil is its condition in respect to looseness or compactness, hardness or mellowness, coarseness or fineness, without reference to the chemical substances contained in it. 416. Few soils are naturally in the mechanical condition best suited for cultivation, though different soils vary very much in this respect. Hence it is as necessary to use the right means to put the soil into the proper mechanical condition, as to apply manure to improve the land in the other modes above referred to. 417. The soil must be mellow, so that the roots of plants can penetrate freely and the air can circulate through it, but still firm enough to hold the roots in their position. It must admit the heat of the sun, and yet hold moisture enough for the wants of the plant. 418. Most soils require to be well pulverized before they allow the roots of plants to penetrate and grow freely, or permit the circulation of the atmospheric air, and if they arc not so pulverized and mellow, they do not readily take up and carry off the water which falls in ruin or comes from other sources. This water often washes away the surface of the soil, or remains stagnant, causing much injury to vegetation. 419. The manner in which land must be prepared for cultivation, differs very much in different cases, varying CLEARING UP. 135 according to the condition in which it is found when its improvement is first begun. The processes most fre quently found necessary are clearing, draining, ploughing, harrowing and rolling. 420. Clearing is generally required in a new country, or when new land or woodland is to be cultivated. In these cases the soil rarely allows even the most ordinary operations of farming. It is often covered with trees or forests, or with rocks which would interfere very much with successful tillage. 421. The term clearing, in a new country, is applied to the cutting down and burning or removing of all the timber and brushwood from the lot. This is simple, though hard work. The trees are felled, if possible, in June, when in full leaf, and the ground may be burned over in season to sow in a crop of winter rye upon the surface. This is the case in remote sections where the timber has so little value as not to pay for removal, and where it is usually burned on the ground. But in other locations, the wood may be cut and removed in winter, and the work of clearing continued the following summer. Sometimes on account of its situation, the cleared land must be devoted to pasturage. In these cases grass seed is sown along with the rye, and cattle turned upon it the following season. But generally the sides of steep hills, or land so rough that it cannot be cleared and prepared for cultivation except at great expense, should be kept for woodland. 422. The next step in preparing wild lands for farming, is to remove the stumps and stones. Several simple machines have been constructed to do this, by which a powerful leverage or purchase is gained, so as to raise a stump or stone of several tons weight from its bed. A 136 PREPARATION OF LANDS. convenient and cheap form of stump puller is Bates' patent, shown in figure 2, and one of the best forms of a stone lifter in figure 3. Fig. 2. Fig. 3. 423. It often happens that the surface is completely matted with roots of hushes, and so hard as to he impcn- TREATMENT OP COLD SOILS. 137 ctrable to the plough in pasture or waste lands which it is designed to clear up. In such cases a stout | grapple represented in figure 4 is found extremely useful in remov ing the surface which may be Fig. 4. burned previous to ploughing. 424. Much land is so situated as to require thorough draining before it can be cultivated at all to advantage. The object of draining is to remove an excess of moisture from the soil. 425. Water standing stagnant in the soil diminishes the good effects of manures very much by preventing decomposition, makes it impossible to work lands early in the spring, prevents seeds from germinating, or makes them germinate more slowly, and delays the ripening of crops, lessening their quantity and making their quality inferior. 426. An excess of water in the soil also excludes the air. This is injurious, because the air does much to pro mote the chemical changes in the mineral parts of the earth which are necessary to the growth of plants, and converts the organic materials in the soil into vegetable acids which give it the name of " sour" or "cold" soil. 427. Drainage is effected either by opening channels on the surface, or by means of covered drains. Open drains are sometimes very useful, but are liable to serious objections. The water which enters them, carries with it many of the substances which make the soil fertile, which are thus lost. Besides, such drains arc 'not nearly as useful as covered ones, while they interfere with a proper cultivation ; they leave a great deal of water in the soil, weeds are very apt to grow along their sides, and they 138 PREPARATION OF LANDS. take up a great deal of ground which might otherwise be made productive. 428. Underdrains avoid these objections, and are more economical. They may be constructed either of stones or of tiles made for the purpose. The tiles are altogether better, both because they can be laid down at less ex pense, and because they last longer. They are also less liable to get stopped up. 429. To lay a stone drain properly, a large trench must be dug. This requires great labor, and such a drain should not be made unless there are a great many small stones on the surface of the land which the farmer wishes to get rid of, and even then the tile drain costs less and is more economical in most cases. The different modes of laying a stone drain are shown in figures 5, 6, and 7. Fiff. 5. Fiff. 0. 430. In laying down the tile drain, the trench may be very narrow, a width of a foot at the top and four inches at the bottom being sufficient, as in figure 8. It is dug by n s|»;id«' ;ind hoes made for the purpose, and illustrated in figures 9 and 10. THE TILE DRAIN. 139 Fig. 9. Fig. 10. 431. The tile drain is not only more economical, but it carries off the water better and lasts longer. If the stones were picked up and placed at the edge of the trench without any expense, the drain made of them would be less economical in the end than one made of tiles which cost |10 or $12 per thousand. 432. The pipe tile, (Fig. lla,) a simple round tube, is found to be the best in shape. For the interior drains which enter into the larger main drains, a tube of two inches in diameter is about the right size. 433. The fall should not be less than one inch to the rod. A drain properly laid in this way may be expected to last and answer a good purpose for half a century. 434. The sole tiles made in this country, shown in figure II6, are not so good because they must necessarily be laid sole down, and if they happen to be warped in burning, as they often are, it is difficult to get a perfectly straight and reliable water course. 435. The brush drain is sometimes made by digging a 13 Fig. 11. 140 PREPARATION OF LANDS. trench and filling up to a certain depth with small brush. When this is attempted, the sticks should all be laid with the larger ends down, as shown in figure 12. The Fig. 12. brush is then thoroughly pressed down and covered over with sods with the turf or grass side down. This is better than none ; but it is never to be recommended where good tiles can be got. The same may be said of log- drains which are made by laying down two logs in the trench with a third upon them, as in figure 13. The earth must be pressed down solid over a stone, brush or log drain. 436. The distance apart at which the drains should be laid will depend on the character of the soil. In a soil which is stiif and holds water long, it might not be well to have them more than twenty-five feet apart, while a more porous soil might be sufficiently drained if they were thirty or forty feet apart, or even more. 437. The depth of the trench must depend somewhat on the distance between the drains. Trenches three feet deep and twenty feet apart, have been found to do as well as those "five feet deep and eighty feet apart. In general the depth should be from three to four feet. 438. Thorough draining makes the soil more open and causes ii more free circulation of air through it, thus prevent in"- it from drying up so soon. The air is at all tim^S clmi-M-ed with moisture1, and as it comes in contact with the particles of soil, this moisture is condensed and i!ep.»sifiMl there, just as we sot; it deposited on the cold sides of a pitcher of ice water in a hot day. Drainage EFFECTS OF DRAINING. 141 also deepens the arable soil and makes it more easy for plants to extend their roots. 439. The atmosphere is charged with fertilizing ele ments as well as with moisture, and as it circulates freely in the soil, these elements are taken up and retained to serve as plant food. 440. The soil having become more porous by the removal of water and the admission of air among its particles, its temperature is raised in consequence, that is the soil is made warmer and warmed to a greafer depth. 441. A higher temperature in the soil hastens forward the growth of plants, and thus often makes the ripening several days earlier. 442. The texture or me chanical condition of most stiff soils is improved by simply draining, and they are thus made capable of -being worked earlier in spring and after long rains, while the growth of plants is stronger and more vigor- a~ ous. The difference may be seen in figures 14 and 15, the former showing the effect of draining and warming the surface soil, #, causing the roots to penetrate even into the moisture below the drained level at &, the latter, the same species of plant on an undrained and unsuitable soil. 448. After the land is properly cleared, it must next be made ready for planting. In the first place the soil must be mellowed or broken up fine to a proper depth. 444. The spade, the plough, the harrow and the roller, 142 PREPARATION OF LANDS. arc the implements most often used in effecting this object. 445. The spade or spading fork is the simplest form of these implements, and consists of a blade or tines of iron or steel fixed into a straight handle. It is worked by hand. Cultivation by its use is the slowest and most expensive mode of tillage, and is adapted chiefly to the nice operations of the garden. 446. The com mon plough, (Fig. 16,) is the implement most commonly used in breaking up Fis- 16- the land, and is the most economical instrument that can be used for the purpose. Without the plough successful farming would be impossible in a country where labor is very high and difficult to obtain. 447. In passing through the soil the plough separates and cuts off a slice of its surface, cutting it both vertically and horizontally, and turning it over in such a way as to leave it exposed to the action of the harrow, which usually follows the plough to break down and pulverize the soil completely. 448. The furrow made by the common plough should be deep, straight, and of such a width that the slice cut off may be turned entirely over, or left on its edge, as the ploughman may wish. 1 l!>. The deptli is of the greatest importance, though experience Iras shown that it is best to deepen the arable soil gradually, by plotiirliini; about an inch or half an inch deeper each time, till it is worked deep enough, say from DEEP PLOUGHING. 143 seven to ten or twelve inches, according to the crops it is designed to cultivate. 450. If much of a poor subsoil should be brought up to the surface at once, the farmer would have to wait two, three, or even four years before he would obtain the largest results, though after that time the good effects of deep tillage would be seen. 451. Deep ploughing has much the same effect as thorough draining, though in a less degree. It enables the roots of plants to penetrate deeply in search of nour ishment, carries off more or less of the surface water, warms the soil, and without doubt makes it more fertile by allowing the air to circulate through it, and by a mixture of the soils of different depths. Besides, deep ploughing makes it much easier to do the other work which is necessary in preparing the soil for planting, and increases the effect of all manures which are applied. 452. Deep ploughing is especially needed in the culti vation of deep or tap-rooted plants like carrots, parsnips, and ruta-bagas, but it is beneficial to all crops if it is properly done. 453. The subsoil plough, (Figs. 17 and 18,) is designed to fol low in the furrow of the common plough, to loosen and break up the lower layers of the soil without bringing them to the surface. With this implement it is easy to loosen the subsoil six or eight inches below the furrow left by the ordi- 13* Fig. 18. 144 PREPARATION OP LANDS. nary plough, making the whole depth to which the land is stirred, from eighteen to twenty-four inches. 454. The benefits of subsoil ploughing are very similar to those of deep ploughing. Recent investigations show that nitrogen and other fertilizing substances exist deep below the surface. Subsoil ploughing enables the roots of plants to reach them by loosening the soil to a greater depth. 455. A very excellent implement known as he Michigan, or double mould-board plough, (Fig. 19,) is designed to Fig. 19. obviate the necessity of the subsoil plough, to some extent. The smaller mould-board cuts off a thin surface and turns it into the last furrow, where it is completely covered with a finely pulverized soil by the principal mould-board. Fig. 20. 456. An implement designed to supersede the use of the plough in many soils, is known as the digger, (Fig. 20.) USE Ol-1 THE ROLLER. 145 Fig. 21. It leaves the ground mellow like the fork, and in good condition for the cultivation of crops. 457. The harrow, (Fig. 21,) is an ancient implement, and is most com monly used after the plough, to break down and mellow or pulverize the furrow slice. It should be moved rapidly over the soil. It has been very much improved within a few years. 458. The cultivator, (Pig. 22,) may properly be regarded as a modified form of the harrow, but it is much better than the harrow, because with its plough shaped teeth, it lightens up and ' mellows the surface soil, instead of pressing it down hard, as the harrow is apt to do every where except Fig. 22. on new, rough land. 459. The roller is often used to pulverize the surface soil. It has so large a surface to rest on the soil, that it crushes and breaks up clods without hardening the lower strata. 460. In laying down lands to grass, it is often useful in pressing down small stones, so as to get them out of the way of the scythe. It is often useful, also, 011 newly sown grain, and hastens the germination of seeds, by preserving the moisture around them. 4G1. But clayey soils should never be rolled except when they are perfectly dry, and for the purpose of 146 breaking the lumps left by the plough. Rolling stiff soils when wet, would only make them too hard and compact, and thus do them more harm than good. CHAPTER XY. SOWING, PLANTING, ETC. 462. Moisture, warmth, and exposure to the air, to some extent, are needed to make the seeds of plants germinate healthfully. Light is not necessary; on the contrary, it is believed to interfere in some degree with the process of germination. 468. The seed is buried in a properly prepared soil, where the moisture soon softens it throughout, and certain chemical changes take place, by which the mealy parts are prepared to nourish the swelling germ. 464. A radical shoot or rootlet first bursts its covering, and invariably grows down, fixing itself in the soil, while a stalk shoots up towards the air and light in which it expands its leaves. 465. By means of its leaves, which serve as its lungs, the plant draws much nourishment from the air. There arc a great many small openings or pores in the leaves, which are most numerous on the under side. On a single square inch of the leaf of the common lilac, there are no less than, one hundred and twenty thousand of these little mouths, and on an inch of the white lily there are sixty thousand. They are found in great REQUISITES OP PLANT GROWTH. 147 numbers on the leaves of all plants. A magnified portion of the leaf of the grape is shown in figure 23. 466. All plants come from seeds, in the first place, and the farmer usually sows or plants the seeds of the plants he wishes Fi 23 to have ; but in some cases tubers or bulbs are placed in the ground and new plants spring from them. A tuber is a thickened portion of a stalk or stem under ground, having buds or eyes, as the potato and the artichoke. A bulb is a collection of fleshy scales formed under ground by certain kinds of plants, as the tulip, the onion, and the lily. 467. Generally the seeds are sown where the plant is to remain. But sometimes they are started in a carefully prepared seed-bed, from which they are transplanted to the field, where they can grow up to better advantage. This is done to bring them forward earlier. 468. For their complete development, all cultivated plants must have a deep, mellow soil, and care enough to prevent them from being injured by weeds or insects while they are growing. The farmer must also attend to fhe choice of seeds, taking only those which are good and still have the power of germination, and must consider how much seed he is to use, how he should prepare it, the time and manner of sowing, and the depth to which the seed should be covered. 469. Choice of Seed. An imperfect seed may still be capable of germination and may produce plants, which appear to grow well at first, but such plants will have a sickly and imperfect growth, especially at the time of flowering, and they will produce little grain and that of an inferior quality. 148 SOWING, PLANTING, ETC. 470. With the same soil, climate and cultivation, the most perfect seed will produce the finest crop. No seed is likely to produce a healthy and vigorous plant, unless it came from a strong and healthy plant itself, was fully ripened, and is so fresh that its power of germination is still uninjured. 471. Good seed may be known by its weight, its size, its glossy surface, and its freedom from any disagreeable odor. Plumpness and weight indicate that it was produced by a vigorous plant ; a glossy covering shows it to be healthy, and the absence of odor shows that it has been well preserved. 472. To learn whether the germinating power still exists, we may take two pieces of thick cloth, moisten them with water, and place them one above the other hi the bottom of a saucer. Then take some of the seeds, spread them out thin upon the cloths, not allowing them to cover or touch each other. Cover them over with a third cloth like the others, and moistened in the same manner. Set the saucer in a moderately warm place, and moisten the cloths from time to time, taking care not to use too much water. Good seed, thus treated, will swell gradually, while old or poor seed which has lost its, germinating power, will become mouldy and begin to decay in a very few days. 473. Such a trial enables the farmer to judge whether old seed is mixed with new. The new germinates much more quickly than the old. It enables him, also, to judge of the quantity he must sow, since he can thus tell whether a hall', three-quarters, or the whole will be likely to germinate, and will know what allowance to make for bad seed. Clover seeds, if new and fresh, will show their genus the third or fourth day. VITALITY OF SEED. 149 474. The seeds of some plants continue good much longer than those of others. Those of many wild plants, for instance, will lie for many years without losing their goodness, if they happen to be in such a place that they cannot germinate, and afterwards when they have heat and moisture, and other conditions necessary for germi nation, they will produce plants. 475. In digging wells, or in other deep excavations, species of plants not before known in the place, often spring up from the earth thrown out. These seeds must have been lying in the earth many years, unable to grow because the heat and air could not reach them. 476. The seeds of the turnip, if kept in a dry, cool place, continue good several years, and will germinate nearly as well when five years old as when only one or two. But the seeds of the grasses are comparatively worthless when two years old, since few of them will then germinate. Age, heat, moisture and fermentation, are most injurious to seeds. 477. Change of Seed. Most of our cultivated plants originally grew wild, and in their natural state were much less valuable than they now are. They have been brought up to their present condition, and made far more useful for the nourishment of men and animals, by careful cultivation for many years. In all these plants there is a natural tendency to lose what they have gained, and fall back to their original condition. This can be prevented in some degree by constant care in the selection of seed and high cultivation ; but experience shows that in some places these plants will gradually lose their best qualities, however much care may be used to guard against it. 478. To avoid the evils of sowing inferior seed, we may use that produced in other localities, where special care 150 SOWING, PLANTING, ETC. is taken to raise it in the highest perfection and purity. In general, seeds should be preferred which were raised on a soil poorer than that where they are to bo sown. 479. When both soil and climate are favorable, the necessity of frequent change may be avoided by good cultivation, and by taking the seeds from the best and most vigorous plants, when they are fully ripe, and drying and preserving them properly. Where this can be done without danger of deterioration, it is far better, since the farmer knows better what he is to sow. Where the species of plants cultivated are very similar to each other, and liable to hybridization or mixture, care must be taken to keep them so far separated as to preserve their purity. 480. The maxim that " Like produces like," so well known among farmers, may be true to some extent in regard to most of the cultivated plants of the farm, but we constantly see instances where the fruit of the plant which grows from a seed, is different from that of the plant which produced the seed sown ; very common examples of this change are seen in the apple and other fruits, and the potato when raised from the seed. In our common cultivated grains, the difference, if there is any, is slight. 481. In a large field of wheat, a few specimens might be found among the millions of plants, which would differ from the seed planted. By carefully selecting these and planting them by themselves, new varieties may be obtained and preserved distinct. 482. So by taking care to select our seed corn from the cars which ripen earliest, we can get early varieties. If we choose seeds from the largest ears, and plant them by themselves, we shall obtain large varieties; and many persons think that if we take our seeds from those plants ORIGIN OP VARIETIES. 151 which have several ears on a stalk, we may thus make very prolific varieties. 483. In these and similar cases, the change or modifi cation from the original to the new variety is not generally sudden, and soon accomplished, but is most commonly slow and gradual. Tl^e seed must be carefully selected year after year, till the desired change is fixed and firmly established. New and somewhat permanent varieties may be thus obtained. 484. But the case is different when we cultivate pota toes and other tubers, since we do not usually plant the seed in such cases, the tubers being only an enlargement of the stem beneath the soil, and when plants grow from their buds or eyes, — as they do in the ordinary manner of raising potatoes, the same variety is extended or increased with no change of character. 485. New and distinct varieties of the potato may be produced to any extent by sowing the seeds of the plant. Thus the chenango, the pinkeye, and other varieties, were first obtained from seed taken from the ripe bolls of other varieties. After a new variety has been once made in that way, it may be continued and kept up by planting the tubers in the usual way. 486. If a vine is produced from a layer of another vine, the new vine is only a portion of the old one, and can never become a new and distinct variety ; and so in budding or grafting, the new growth is only a portion of the same old tree from which the scion was taken, and has precisely the same character as the tree from which the bud or graft came, except so far as it may have been changed by the difference of soil or locality. But if tho seeds of the apple or of the grape are sown, new varieties are obtained at once. 14 152 SOWING, PLANTING, ETC. 487. Quantity of Seed. The plants should cover the whole ground, each having just room enough to allow its full and complete development and no more. To learn how much seed will be necessary for this we must consider the character of the soil, its preparation, its fertility and the tune of sowing. The quality of the seed, the extent to which it is apt to tiller or send up side shoots, and the manner of sowing must be taken into account; also the habits of growth of the plant — whether it is large and rank or otherwise, and the mode of tillage to be adopted — all these must be regarded. 488. The richer the soil and the more manure there is used, the ranker the plant will grow. The ranker the growth the more space will it require for its full develop ment. On the other hand, in a poorer soil, the plant will grow less rankly, so that more seed will be required to cover the ground with plants on poor and scantily manured land than on rich land well manured. 489. The better the seed the less will be required. If the climate and soil are very favorable to the plant, a smaller quantity of seed will be needed, since a larger number of plants will grow from the same quantity of seed. So the earlier the sowing is finished, the less seed may be used provided the season is favorable. 490. If the soil is perfectly clean and free from weeds less seed is necessary. Much also depends on the distri bution of it, and the more uniformly it is spread the less is required. For this reason hand or broad-cast sowing requires more seed than machine or drill sowing. In general, it may be said that winter wheat and rye, and other winter grains, require less seed than the spring varieties. PREPARATION OF SEEDS. 153 491. Other things being equal, thin sown crops ripen later than thick sown ones. The greater the space allowed each plant the more vigorous will be its development, and consequently., the slower its growth. In thick sown crops the growth is more quickly finished, and though the stalk may be rank the ear will be smaller, and the number of grains to a .stalk less than in thin sown crops. By thick sowing we gain in time, but lose, to some extent, in quality. 492. Steeping Seeds. Some farmers are in the habit of soaking the seed in warm water, or in some solution like carbonate of ammonia, linie water, chloride of sodium or brine, partly to hasten its germination and partly to supply the place of manure. When the sowing has been delayed till after the proper time, this practice may be useful, but it is better to sow or plant at the right season, and so avoid the necessity of any thing of the sort to make the seed germinate more quickly, and as a substitute for manur ing the land properly, this practice is of very little benefit. 493. The moisture of the soil is best adapted to nourish the germ, and the growth of the plant through the season will, generally, be more healthy without the use of any artificial preparation. 494. Time of Planting. The time of planting varies according to the season and the nature of the plant. Some grains, for instance, will endure a great degree of cold during the early period of their growth. It is gen erally considered better to sow these in autumn, and spring sowing would not do well. Others cannot bear much cold and should not be sown till spring. The con dition of the soil, also, makes a great difference. A dry, warm soil is ready for planting much earlier in spring than a cold, clayey one. 154 495. The time of sowing should be suited to the nature of the particular plant we wish to cultivate. Indian corn, barley and buckwheat, for example, should be planted when the ground is dry and warmed, by the heat of the sun, while certain kiilds of wheat and oats do better when sown in a colder soil. 496. Winter grains should be sown earlier on heavy soils than on sandy ones, and earlier in a cool, moist climate than in a dry, warm one. There is no general rule as to the time of sowing which can be applied to all cases, and ihe farmer must always be governed by the circumstances of his own case. 497. Depth of Covering. The seed should be covered to such a depth as to secure the amount of heat, moisture and air, necessary for its germination. This depth varies with the kind of plant, the nature of the soil, the climate and the time of planting. 498. It is evident that on a clay soil which is less easily penetrated by air and warmth, the seed should be covered less deeply than on a sandy one. Spring planting ordi narily requires greater depth than autumn. 499. Very small seeds require only a shallow covering, and in many cases, a simple rolling without the use of the harrow, is sufficient to secure perfect germination. In common farm cultivation great losses often occur from covering seed too deeply, especially the smaller seeds, as those of the grasses and the clovers. 500. Modes of Sowing. The broad cast or hand sow ing- is the most common for the smaller grains. Another and a better method is by the use of the seed sower or drilling machine. By the first a greater amount of seed is required, while it is difficult, even for a skilful workman, to distribute the seed equally. By the second, the seed ADVANTAGE OF DRILL SOWING. 155 is not only uniformly distributed, but may be sown in drills, which has some decided advantages over broad cast sowing, especially for wheat. Winter wheat sown in the drill is less likely to be thrown out by the frosts, because it is more uniformly covered and better rooted. 501. Any concentrated manure may be put into the ground with the seed, and the growth of the plant may thus be promoted. A larger yield is secured in propor tion to the quantity of seed sown, and a larger yield per acre. Drill sowing, or sowing in rows, also allows culti vation by a machine admirably adapted to this purpose, if the crop needs it, during the early part of its growth. 502. When seeds of any kind are sown broad cast by hand, they may be covered by the plough, the harrow, the cultivator or the roller. The larger seeds, like Indian corn, are usually dropped by hand and covered with the hoe, but they may be dropped and covered by seed sowers made expressly for the purpose. When a large extent of land is to be planted the machine is far more economi cal. Indeed, it is often necessary to use it to save time and labor. Seed sowers are used only on land properly prepared by ploughing, manuring and harrowing. They are made to drop the seed either in hills or in rows, according to the wish of the farmer. 503. If the machine is not used the ground is first prepared by ploughing and harrowing, and furrowed three or four feet apart, according to the kind of corn to be planted, with a light horse-plough ; the manure is dropped in the hills at suitable distances, and the seed then dropped upon it by hand and covered with the hoe. 504. It is generally found best, especially on late lands, to spread and plough in a part of the manure, and to drop the remainder in the hills. The manure in the hills 14* 156 SOWING, PLANTING, ETC. gives the crop a vigorous start at the outset, while that which is ploughed in, being better distributed in the soil, has its effect afterwards, and the crop does far better in the end than it would if the whole were placed in the hill. The land is also left in a better condition for a future crop where the manure is spread. Many use some con centrated manure in the hill, and plough or harrow in the coarser barnyard manures. 505. Transplanting. Transplanting is the removal of a plant from the place where it has grown to another. The seeds of many plants, as those of tobacco, cabbages, and many varieties of shrubs and trees, are often sown in a place prepared for the purpose, and the plants spring ing from them afterwards transplanted to the fields where they are to grow. 506. This mode of culture has several advantages : it confines the expense of the early culture to a small space, while the seed is placed in the best condition for its early and rapid development ; it also gives more time for the preparation of the land in which the crops are to be 507. To make transplanting successful, the plants should be strong and vigorous. They may be made so by preparing the seed-bed thoroughly and taking care tg prevent them from being crowded by each other or injured by weeds, after they have sprung up. They should be removed very carefully, all injury to the roots I M -iii" avoided, otherwise they will suffer much from the removal. 508. While the plants are young there is little danger in transplanting, and if they are set out in a mellow and well manured soil at a favorable time, they will continue to grow with only a slight temporary check. TRANSPLANTING. 157 509. In removing older plants, like trees and shrubs, which have been undisturbed for a long time, the utmost care is required in taking them up, to prevent the loss of the small fibrous roots which often extend to great distances from the trunk. 510. The growth of the stem, or that part of the trunk above ground with its leaves and branches, is in propor tion to the extent of the roots, and the injury which the latter sustain in transplanting may be counteracted, in a measure by trimming off a corresponding portion of the top. 511. The laceration or breaking of the roots checks the growth of the top in proportion to the injury or loss of the root. In the natural condition of the tree there are only roots enough to absorb the nourishment required by it, and when a part of the root is cut off, or seriously injured, the remaining part cannot, of course, furnish sap enough for the whole tree. In this case, if a part of the top is removed, less sap is required, the remaining roots can supply all that is necessary, and the tree may thus be saved. 512. One method of obtaining good shrubs and trees for ornamental purposes,. is to sow the seeds in beds prop erly prepared. The soil used for this purpose should be deeply trenched and richly manured to promote rapid growth. It is most convenient to lay out the beds from three to five feet wide, and to have the rows run across. Early autumn is generally thought to be the best time for sowing, though some prefer mid-summer. The seeds of each species may be sown soon after they have become fully ripe. CULTURE OF THE CEREALS. V t CHAPTER XYI. i CULTURE OF THE CEREALS. 513. The plants generally cultivated by farmers may be divided into four classes: 1. The cereals or grain plants, comprising the plants cultivated for their large farinaceous, or mealy seeds ; 2. Leguminous vegetables ; 3. Forage plants, or plants used principally in the feed ing of stock ; and 4. Plants used in the industrial arts. 514. The Cereals. The term cereal is derived from Ceres, the fabled goddess of corn. The cereals embrace all those annual grasses cultivated for the nourishment of man, including Indian corn, wheat, rye, barley, oats, rice and millet. Buckwheat might be added, in a practical classification, though not properly included among the cereals, as its seeds have much the same quality and are used for the same purposes as those of the cereals properly so called. 515. Indian Corn, or maize, is one of the most important of the cereals cultivated in this country, both on account of the numerous uses to which it may be put, and the great amount of nourishment it contains. It is an American plant, and was found in cultivation among the- Indians on the first discovery of the continent. 516. Light and porous loams a little sandy, are most likely, if well tilled, to yield large crops of Indian corn. But it easily adapts itself to a variety of soils, and will flourish on all if well manured, except the strongest clays. 517. Land should be prepared for Indian corn, in very much the same way as for other crops, and the preparation INDIAN CORN. 159 must vary according to the crops for which the piece has been used and the state it is left in. If the field that is to be planted with corn has been in grass dfor some years, it should be well ploughed the autumn before the planting, and then left till spring, when it will be partially mellowed and may be cross ploughed, manured, harrowed and planted. 518. But stiff, undrained soils, and lands lying on the slopes of hills liable to be washed down by the rains, should, if possible, be broken up in the spring insteacl of the fall, as the sward will not rot, and if turned up in. cross ploughing in spring, will be troublesome during tjie cultivation, of the crop. 519. The manures used with this crop must be varied according to the character of the soil. On light, well worked and mellowed land, old and well decomposed barn yard manure or compost is best, but if the soil is stiffer and somewhat clayey the coarser barnyard manures may be used to advantage, as they improve the texture of the soil and produce heat by fermentation. 520. It is generally thought best to plough in the coarse manures in the fall, as they thus become decomposed and prepare the ground for spring planting. They may be turned under on the sod or 011 a grain stubble. But if the ground is level they may be spread upon the furrow, after fall ploughing, and left over winter to be turned under in cross ploughing in spring. 521. In cross ploughing, the sod turned under the autumn before should not be disturbed. If the manure is ploughed under in the fall, some finer compost should also be used in spring -to be spread on the furrows after cross ploughing, and harrowed or cultivated in. If the soil be stiff and cold, such as is ill adapted to Indian corn, 160 CULTURE OF THE CEREALS. a portion of the fine manure or compost should be placed in the hill. 522. The Indian corn plant is a gross feeder, and needs a great deal of manure unless the land is very rich. If all this manure is put into the hills, the labor and expense of application and the care of the crop through its whole growth will be increased, on account of the hilling up around the corn made necessary by putting so much in the hill. 523. Another objection to putting much coarse manure in the hill is that the plant is more liable to suffer from drought, and the land is not benefited to so great an extent as when a part of the manure is spread or evenly distributed through the soil. 524. Some spread and plough in the coarser manures, and use some concentrated fertilizer in the hill to give the crop an early and vigorous start. No doubt a judicious use of concentrated manures is good economy, and in some circumstances it may be well to use them more freely, but they are not to be recommended in all cases, as their cost is frequently greater than the profit which may be made from their use. 525. To raise corn profitably the land must be in good condition ; it may be made so by the use of a sufficient quantity of manure at the time of planting, or by long- continued and judicious manuring previously. It is not worth while to raise poor crops. It requires about as much labor in ploughing, hoeing and harvesting, to raise thirty or forty bushels per acre, as to raise from sixty to seventy-five bushels per acre, and the profit is irn-alcr \\itli llic bif.ri-r crop. .">-»'>. In tin1, cull u iv of .Indian corn, as of many other crops, the one thing ;irnyard while still unfermen ted, which were formerly much used for potatoes, have been found by experience to increase the liability to disease, and hence should be avoided, if possible, and if used at all they should be ploughed in rather than applied in the hill. Ashes or plaster of Paris may be used in the hill to advantage. 607. The potato may be cut into pieces before planting, each piece containing one or more eyes or germs, and a certain proportion of the body of the potato. The latter furnishes nourishment to the germ in the first shirrs of its growth. Cutting is often judicious, and always so when the potatoes to be used as seed are to be CULTURE OP THE TURNIP. 179 purchased. The largest potatoes grow from eyes taken from that part of the tuber nearest the stalk. 608. The crop may require two careful hoeings, and the weeds should be kept down by further cultivation, if necessary. At the first hoeing, when the plants are from one to two inches high, the plough or the cultivator may be used between the rows, as the workman may prefer. 609. The crop is harvested in the month of September or October, according to location and the variety, being lifted out of the ground by the hoe, or, which is far better, the eight-tined fork. Some farmers run a furrow with the common plough through the rows. 610. The Turnip. The turnip is cultivated with the highest success only in a moist and equable climate. In this country, on account of the excessive droughts to which we are subject, the large size of root and luxuriant growth so frequently found in Scotland and the west of England, are seldom to be seen. Possibly the deficiency in weight of the crop may be made up by a greater amount of nutriment in proportion to weight, as in the case of grasses and other plants grown in a dryer climate. But this must be determined by more extended experiment and accurate analysis. 611. The common turnip is very highly esteemed as a valuable food for stock, especially for sheep, and its cultivation is regarded as one of the best methods of preparing the soil for a succeeding crop of grain. 612. Experience has shown that it is very advantageous to raise alternately a deep or tap-rooted crop like the turnip, carrot or parsnip, and a surface-rooted one like wheat, rye, barley, &c. The form of the root of some of these plants is shown in figure 34. The root crop is 16* 180 ESCULENT ROOTS. Fig. 34. not only valuable in itself, but it also draws up from the lower strata of the soil more or less of the valua ble plant nourishing sub stances always present there, and leaves a portion of them near the surface, where they can easily be reached by surface-rooted plants. G13. The varieties of the turnip are very numerous. Those most commonly cultivated arc the common globe, the purple-top strap leaf, the hybrid, and the Swede or ruta-baga. Many others have a local reputation, and are more or less valuable. 614. The soils best adapted to the turnip are light loams, loose and open, under full cultivation or thoroughly ploughed and pulverized. There are few crbps which require so much preparation of the land before planting. 615. The land designed for the Swede or ruta-baga, should be very deeply ploughed the preceding autumn, the deeper the better. Two thorough ploughings should also be given in the spring, to be followed by a careful harrowing so as to mellow and completely disintegrate or break up and pulverize the soil. The flat turnip requires less depth and thoroughness of cultivation. 616. The soil should be enriched by an abundant supply of manure. On poor soils the root soon degenerates and becomes small and acrid. The manures best adapted to this vegetable are those rich in phosphates, such as dissolved bones or bone dust, guano and super-phosphate of lime. TURNIPS AS FOOD FOR STOCK. 181 617. Manures rich in nitrogen and comparatively poor in phosphates, promote the growth of the leaf rather than of the bulb, and their injudicious use will produce an inferior crop. When the soil is not very rich and soft in itself, a heavy dressing of farmyard manure may safely be ploughed in, and home made super-phosphate or bone dust, mixed with guano, may be applied near the surface or in the drill. 618. The common round or flat turnip is usually sown broadcast and harrowed in, but the Swede or ruta-baga is sown in drills about two and a quarter feet apart, with the seed sower. Neither should be planted in ridges or raised drills, except on very thin soils, as the benefit to the land of a deep-rooted crop is less marked, than if the ground is kept level. 619. From two to three pounds of seed are allowed per acre. This quantity will give more plants than can be grown to advantage, and they should be thinned out so that there may be a proper distance between them during the summer. 620. The horse-hoe may be used between the drills when the first rough leaves have appeared. This is followed by the hand-hoe to clear out the weeds and stir the soil around the plants. Subsequent hoeings will be necessary to prevent the growth of weeds. 621. Turnips may remain in the ground till the hard frosts begin, without injury. They should then be taken up and stored in suitable root cellars or in pits on the field, where they may remain till wanted for use. 622. As has been said, turnips are a valuable article of food for sheep and all kinds of store cattle. An animal can easily be fattened on turnips and hay. They should be cut with the shovel or the turnip-slicer before being 182 ESCULENT ROOTS. fed out. From seventy-five to one hundred pounds a day, in addition to hay or straw, may be fed to an animal of a thousand pounds weight. 623. The kohl-rabi is a hybrid turnip, or turnip- stemmed cabbage, much used in some countries as food for man and animals, It is sown early in spring and cultivated like the cabbage. 624. The cabbage is not very common as a field crop in this country, but is mostly confined to the home or market garden. It requires a very rich clayey soil and high cultivation. The seed is usually sown in beds to be transplanted into hills, where it is hoed and cultivated like other garden vegetables. 625. The Beet. There are many varieties of the beet, but all may be included under the two general designations of garden and field beets ; these may be again sub-divided according to their size and color, the shape of the root, and the purposes to which they are applied. Field beets comprise those used for feeding cattle and making sugar. 626. The Mangold Wurzel is more esteemed for stock feeding in this country than any other variety of beet. It does best on a rich, deep, well-manured soil, with thorough cultivation, but will accommodate itself to most soils that are strong, deep, and well tilled. 627. To prepare the land for the beet it should be deeply ploughed, manured, and harrowed level ; the seed should then be sown by a machine in rows at the rate of throe or four pounds per acre, and covered to the depth of an inch. It is a common practice to steep the seed in wain1 i<>r twenty-four hours before sowing. 628. Tin; after cultivation consists mainly in the free use of the cultivator or horse-hoe, and the hand-hoe, so as to keep the surface fresh and free from weeds. Man- CULTURE OF THE CARROT. 183 golds may stand a foot apart in the rows. If they are a foot apart in the rows, the rows being two feet apart, there will be more than twenty thousand plants to the acre. 629. The Mangold may be harvested in October. If the root is bruised or injured it is liable to decay, and care should be taken to guard against the possibility of this. When well stored in a cool cellar or in pits dug for the purpose, it will keep through the winter, and cattle of all kinds are very fond of it. 630. The Carrot. The carrot is very valuable as a forage crop, and is extensively cultivated and highly esteemed. No root is more relished by domestic animals. Weight for weight it is somewhat less nutritive than the potato ; but its greater yield per acre more than makes up for the difference in quality. 631. Horses are especially fond of it, and when not kept at very hard work, should have it as part of their regular food. It keeps up their condition, and gives them a fine glossy coat. When fed to cows it increases the richness of the milk somewhat, and is supposed by some to give a richer color to the butter, while for sheep and lambs it is also a valuable article of food. 632. The cultivation of the carrot is generally more expensive than that of most other root crops. It requires much slow and toilsome hand labor, unless great care be taken to avoid sowing the seeds of weeds with the manure. But on clean land, and with the use of concentrated manures like ashes, plaster, guano or old and well decomposed compost, the cost of the crop need not be much greater than that of other roots. 633. There are several varieties of this root, all of which probably came from the common wild carrot of Europe, the Daucus carota. The most valuable for field 184 ESCULENT ROOTS. culture are the short horn, the long orange, the white Belgian, and the altringham. The white Belgian will give the heaviest yield, on the whole, but the long orange sells better and is somewhat more nutritious. The white Belgian is often of greater size, but coarser and of less weight in proportion to its size. But many think the short horn yields a more valuable crop than either. 634. The carrot grows in almost any variety of climate found in this country, but it is more especially adapted to the northern regions, which ordinarily suffer less from drought. • Excessive dryness stops its growth and materi ally lessens its product. 635. It is most productive on a deep, light, warm loam, capable of retaining a moderate degree of moisture in summer, but with a dry and open subsoil. 636. Deep ploughing and subsoiling are especially important in the cultivation of this crop. The size and weight of the root depend very much upon deep tillage. 637. No manures of a coarse or very stimulating nature should be used. They cause a useless growth of fibrous roots and leaves to the injury of the main root. Land enriched by previous high culture, where manure will be unnecessary, is to be preferred for this crop, but in any case only old and well-rotted manures, or some concentrated fertilizer, should be used. These may be spread on the furrow after deep and thorough ploughing, and harrowed in when the land is ready for the seed. 638. The seed should be new and fresh. When two years old it will often fail to germinate. As it does not start till utter it has been exposed to moisture for some time, it is often soaked for eight hours or more, and then spiv;itl oui quite thickly on the floor, where it is left till it begins to germinate. This will generally be in six or TIME OP SOWING. — THINNING. 185 eight days. It should then be immediately rolled in plaster and sown by the seed sower, in drills from fourteen to eighteen inches apart. 639. If the seed is new and good, two or three pounds to the acre are quite enough to plant. If its quality is unknown, four or five pounds may be used and the plant thinned out while growing. The covering should be but slight, not more than half an inch in depth. 640. The ground should be fully prepared in the previous autumn, and the seed put in as soon after the 15th of April as possible. The plant does better if started while the ground is still quite moist, since it is very slow in its early growth. 641. When the plants are well up so as to be distinctly seen, they should be hoed and weeded. It is much easier to keep the weeds down at the outset, than to get them out after they have overrun the crop. The number of hoeings will depend much upon the character of the soil and the previous culture. If the land is foul or very weedy, it will require constant and repeated labor, at an expense greater in some cases than the value of the crop itself. 642. At the second hoeing, or when the plants are two or three inches high, they may be thinned out if they require it, but a greater weight per acre may be obtained without much thinning, and the smaller roots, though they do not look quite so well, and will not sell for so high a price, perhaps, are better for stock than very large ones grown four or six inches apart. 643. Carrots maybe allowed to stand till the early part of November without injury from frost. They may be raised from the earth by the plough or the fork, and stored for winter use, the tops being fed to stock. 186 ESCULENT ROOTS. 644. The Parsnip. The parsnip is another plant which has been made valuable by culture, the original wild parsnip being altogether worthless. It is cultivated both as a field and a garden crop, and deserves far more atten tion than it now receives from the farmer. 645. There is little doubt that the parsnip is more nutritive than the carrot, that it is more hardy, some what less liable to be injured by diseases or insects, while it is more easily cultivated and more productive. It is much liked by all animals, and is thought to give a richness to the milk of cows which no other root can, except, perhaps, the carrot. It is claimed that its use enables the farmers of the islands of Jersey and Guernsey to make butter in winter, as rich and high-flavored as they can upon the grasses of June. 646. There are two varieties of this plant, both derived from the same source. They are the round or garden, and the long field or large Jersey parsnip. The farmer will find the latter the most profitable. 647. The parsnip prefers a mild and moist climate for its early growth, but it endures our severest cold, and may remain in the ground through the winter to be dug up fresh in the spring and used for feeding stock. 648. It is most productive on chalky or clayey soils, and sands rich in mould or humus, but will grow well wherever carrots will. In some parts of France carrots ;ui(l parsnips are cultivated together. 649. The parsnip being a tap-rooted plant, the soil must bo prepared for it in the same manner as for carrots. The seed used should be of the growth of the preceding year. The sowing and after cultivation arc like those of the carrot. THE PARSNIP.— THE ARTICHOKE. 187 650. In a proper climate and soil, the parsnip yields more than the carrot, but it is, probably, a more exhausting crop. 651. The Jerusalem Artichoke. The Jerusalem arti choke is nearly as nutritious as the potato, and its stalks are almost as valuable as its tubers. It has never been cultivated to any great extent as a field crop, in this country, but many cultivators of it in Europe claim that it has many advantages. Among others, that it grows well on light sands and tenacious clays, where no other root crop would succeed. They say it does not exhaust the soil, but may be grown year after year in the same place ; that it is free from diseases, and endures alike the colds of winter and the droughts of summer. 652. Its cultivation is much like that of the potato, the land being prepared and manured in the same way. The tubers are planted early in spring, in rows or drills, the rows being far enough apart to allow working between them, and the plants about nine inches apart in the rows. 653. In countries where this plant is cultivated as a field crop, the stalks are either cut and fed out green, beginning, in France, about the end of August, or left to be cut with the sickle, and stocked and dried for winter fodder. After the stalks are cut and removed, the tubers are taken up as they are wanted to feed out, or dug late in the fall and stored for winter use. Most kinds of farm stock are very fond both of the stalks and the roots. 17 188 FORAGE PLANTS. CHAPTER XIX. THE GRASSES — FORMATION OF MEADOWS OR UPLAND MOWINGS. 654. The culture of the natural and artificial grasses and other forage plants arose from the necessity of providing sustenance through the winter, or inclement season, for the domestic animals on which the success of agriculture so much depends. It is evident that this department of farming is of the highest , importance, especially when we consider how dependent the raising of stock must be upon it. 655. The grasses may be classed, for convenience, un^er two general divisions, the natural and the artificial. The natural grasses comprise all the true grasses, or plants with long, simple, narrow leaves, and a long sheath divided to the base, which seems to clasp the stem, or through which the stem seems to pass. Each leaf has many fine veins, or lines running parallel with a central prominent vein or midrib. The stem is hollow, with very few exceptions, and closed at the joints. 656. The artificial grasses are mostly leguminous plants, with a few others which are cultivated and used like the grasses, though they do not properly belong to that family. The clovers, lucerne, sainfoin, medic and other similar j ilants, are included among the artificial grasses. 657. Lands laid down with the natural grasses are designed as more permanent mowings than those sown uiih the mtilicial ones alone. They are sown with a number of species of the true grasses, must of which are NATURAL AND ARTIFICIAL GRASSES. 189 perennial, and are to be used as mowing lands or for pasturage. The artificial grasses are more frequently intended to occupy the ground for one or two years only in the rotation with other crops, and are generally com posed of only one or two species of plants, and those annuals, or at most biennials. 658. In this country it is common to sow one or more species of clover with the natural grasses. The clover then occupies the ground almost exclusively during the first and sometimes the second year, but afterwards the perennial grasses take its place and form a permanent turf. 659. The natural grasses form a close turf or sward, and when left uncut to be fed off by animals, this turf makes what is called a pasture or pasturage. 660. There are certain situations which must be improved as pasturage, if at all. Such are steep slopes on which cultivation is difficult or expensive, and where the soil would be washed into the valleys below, if broken up by the spade or plough ; also lands which lie along the margins of streams or rivers liable to periodical overflows, by which growing crops might be endangered or the soil be washed away, and low marshy lands which cannot be drained so as to produce annual crops. In these latter situations, however, the wild grasses frequently come in so luxuriantly, on account of the richness of the soil, as to give good crops for hay for many years in succession, without any cultivation whatever. 661. There are great differences between the different species of grasses. Some are short lived, others more permanent ; some mature early, others later ; some contain much nutriment, others little. The different species require different kinds of soil also, and withdraw from it different substances and elements. 190 FORAGE PLANTS. G62. By the use of many judiciously selected species together, a greater weight of grass and hay can be obtained from an acre than if only a few species be used. Probably this arises from the fact stated above, that the different species use different kinds of nutriment. On a certain space, say on a square foot of soil, as many plants of a particular species of grass will grow as can find there the kind of nourishment they need ; no more of that species can grow there, of course ; they would starve as it were, but other plants of a different species of grass, which require different substances to support them, may grow on the same soil, because the plants of the first have not consumed any of the substances which- they want ; so as many plants of the second species will grow there as can obtain the sort of nourishment suited to them; a third species, and others needing different kinds of nutriment may be added, and this may go on till the soil is crowded as thick with the plants as they can grow. GGo. In selecting a mixture for mowing or for pasturage, regard should be had to the modes of growth and other peculiarities of each kind. A grass well adapted to cut for hay, may be very unsuitable to form a pasture turf. Timothy, though one of the best of our grasses for mowing, is not good to sow for pasturage, as it cannot bear the close cropping of cattle. 664. Among the grasses which may most profitably be cultivated for mowing, may be mentioned Timothy, rcdtop, white bent, orchard grass, perennial rye grass, June grass, rough stalked meadow grass, fowl meadow grass, meadow fescue, and tall fescue.* Other * The natural history, culture and economic value of the grasses arc fully -t.iti-.l in the Tr.-ali.-c on (irassrs and Forage Hants, uhich those who desire to make themselves mure lam i liar \\ith the bitljeet may cunaulL. GRASSES FOR PASTURAGE. 191 species might be mentioned as worthy of cultivation for tills purpose in particular localities, or when the hay is to he applied to some particular use,- hut the above are the most valuable. 665. Among the species more particularly fitted to form pasturage, are meadow foxtail, orchard grass, sweet scented vernal, June grass, redtop, meadow fescue, and yellow oat grass. 666. In selecting the species to be sown, the time of flowering of each species should be regarded. When seeds of different grasses are mixed for mowing land, such kinds should be chosen that all will come into flower at about the same time, otherwise one species will have begun to spoil before another is ready for cutting. 667. In laying down pasture land 011 the contrary, the object is quite different. Here we wish a constant succession of green and succulent herbage from early spring to late autumn. Hence some species may be valuable not for their nutritive qualities, but from their habit of very early or late growth. The sweet scented vernal, one of our earliest grasses, is an instance of this. 668. The grasses attain their utmost luxuriance only in a moist and mild climate. Severe heats and long pro tracted droughts check their growth and make it very difficult to form a close sward. Generally speaking, our grasses suffer much more from the droughts of summer than the colds of winter. It should be added that grasses grown in a dry climate, or a dry season, contain more nutriment in proportion to their weight. 669. The best time for sowing the natural grasses, in the latitude of the northern States, is about the first of September, since they can then become strongly rooted before the approach of winter. The practice of sowing 17* 192 FORAGE PLANTS. in spring with oats or some other grain formerly prevailed, bnt the droughts of summer very often killed out the young plants, made tender and weak by the shade of the grain crop, and great losses were the consequence. 670. To form a good seed bed it is desirable that the land should be under cultivation and well manured for two or more hoed crops. It is then deeply and thoroughly ploughed and harrowed, so as to leave it in a mellow and friable condition. 671. The seeds mixed as already recommended, may then be sown by hand and simply rolled in. They should not be covered to any considerable depth, and a heavy harrow will bury many of them too deep. If no roller is at hand, or if the ground is so wet that it cannot be used to advantage, its place may be supplied by a bush harrow. 672. It has been found by experience that in general the grasses do better when sown in the fall by themselves ; but on clayey, undrained soils, where fall sowing is impracticable on account of the great liability to injury by being thrown out by the frost, it would be better to sow with wheat or barley in the spring. Such lands will not be liable to suffer from drought. 673. If clover is to be sown on land laid down to grass in September, the March following is the best time. The seed may be strewn on the last light snows of that month, and will vegetate without any covering, though if the land be sufficiently dry a roller may be passed over the surface and will be beneficial. 674. The artificial grasses comprise red, white and other clovers, lucerne, sainfoin, medic and some others. THE ARTIFICIAL GRASSES. 193 They may be grown alone or mixed with the natural grasses. 675. Red clover is one of the most valuable and economical of forage plants. Its long tap-roots loosen the soil and let in the air, while by their chemical action they fix gases which enrich the earth very much. The decay of them in the ground also fertilizes it, and the plant shades and protects the surface, and helps to destroy many annual weeds. G76. Clover is what may be called a lime plant, and the soils best adapted to it are clayey or tenacious loams. It generally does well on good wheat lands. Recent investigations have shown that lime enters largely, into its composition. 677. White or Dutch clover is as common as the red, and often forms a considerable portion of the turf of pastures of a moist and tenacious soil. It is most commonly cultivated for pasturage, and many think it to be as valuable for that purpose as red clover is for hay, or for soiling or feeding out green to stock ; but cattle are not so fond of it. 678. Neither lucerne nor sainfoin are cultivated in this country. The former has been found to be ill- adapted to our climate, suffering severely in the southern States from long continued droughts, and as severely in the northern from the low temperature and the sudden changes of winter. 194 PLANTS USED IN THE ARTS. CHAPTER XX. PLANTS USED IN THE ARTS AND MANUFACTURES. 679. Plants used in the arts are most commonly divided into three classes: 1. Oleaginous plants, or those raised especially for their oils ; 2. Textile plants, or those raised chiefly for their fibre ; and 3. Plants used in the pro cesses of dyeing, tanning, and various manufactures. 680. The only plant raised to any extent in this country for its oil is flax, which is also cultivated for its fibre. The seed is ground and the oil pressed out, leaving what is called linseed cake, which when ground or broken up fine is known as linseed meal, a valuable food for stock. The oil obtained from it is known as linseed oil, exten sively used in mixing paints and for other purposes, and always sells readily at a good price. 681. Flax flourishes in a great variety of climates, and as it grows very rapidly and requires but a short time to complete its growth, may be cultivated in high northern latitudes. The soil on which it is sown should be rather light, or at least not very stiff and heavy. A light loam inclining to sand, which may be deeply and easily tilled and kept clean of weeds, is best. 682. But the choice of soil should depend on the object in view. If flax is raised principally for the seed, it can hardly be too rich and well-manured. But if the plant be grown mainly for fibre, a very rich soil is objected to, as it makes the fibre rank and coarse. 683. Old and well-rotted barn manures may be used lor this crop, and lime, ashes, or other substances CULTURE OP FLAX. 195 abounding in lime, are good. A heavy dressing of stable manures may also be ploughed in deeply-in the fall. In the cultivation of flax it is very important that the lower strata of the soil should be in good condition. 684. If the soil be mellow and under good cultivation, one ploughing followed by a thorough harrowing will be sufficient, but if it be stiff and ill prepared, two plough- ings at least will be necessary. 685. The quantity of seed to be sown also depends upon the object in view. If it be desired to raise the seed, only two bushels per acre will be enough. If the fibre, about three bushels is needed. If the less quantity be used, the plant will grow stalky and branch and produce much more seed. 686. But if the larger quantity be sown, the plants force themselves up in a single stem, without branches. This gives a better fibre, as branching shortens it and makes it irregular. A long, straight, fine and delicate fibre is by far the best, and it is found to be more profitable to cultivate the plant so as to obtain this, than to raise it for the seed. 687. The seed is sown broadcast and covered with a light harrow, then rolled. After the plants are up they should be kept as free as possible from weeds, which should be pulled up by hand. If the flax has been sown thick on land well-cleaned by a hoed crop the previous year, the weeds will not be troublesome unless their seeds have been sown in the manure. 688. The old method of harvesting flax was to pull it by hand, tie in small bundles, and stook it. But the processes of manufacture are now so far perfected that the crop may be cut with the scythe or the cradle. The old processes of water rotting, breaking, swingling, &c., 196 PLANTS USED IN THE ARTS. are now superseded. For the fibre the plant is cut as soon as the blossoms begin to fall, but if the object be to secure both seed and fibre, it should be left till the bolls have turned yellow. 689. When the flax plant is cultivated for the fibre, from ten to fifteen bushels of seed may also be expected per acre, depending on the character of the land and the thoroughness of culture. 690. Hemp, another textile plant, is cultivated princi pally for the sake of its fibre, which is used in the manufacture of ropes and coarse cloths. It belongs to the same family of plants as the hop and the nettle. 691. The soil best adapted to hemp is a deep rich mould of loam and vegetable matter, with fine sand and clay intermixed. The rich alluvial lands of Kentucky, Missouri, and other western States, are admirably fitted for it. 692. The seed is sown broadcast early in spring, at the rate of from one and a half to two and a half bushels per acre, according to the fineness of the fibre desired. Thick sowing, as in the case of flax, produces a finer fibre. When the blossoms begin to fall in July or August, it is cut up and sorted into different lengths, and bound up into bundles six or eight inches in diameter, and put into pools or cisterns of water for rotting. After being sufficiently rotted, the bundles are taken out, dried and stacked, till ready for the mechanical processes of breaking and manufacture which follow. 693. Osier Willows. Among the plants used in various manufacturing industries, and which form a considerable item in the agricultural interest of the country, may be mentioned the Osier willow, broomcorn, and the hop. OSIER WILLOWS — BROOMCORN. 197 694. Osier willows are cultivated for the purpose of basket making. Among the varieties most approved are those known as the Dutch willow, the purple willow, the round-leaved, and the long-leaved triandrous willow. 695. Willows will grow in a great variety of soils if thpy be only moist enough ; but deep, rich, moist intervals or low alluvial lands, lying on the margin of streams, especially such as have a southern exposure protected from high winds, arc most suited to them. 697. The willow grows well on moist soils, but it should not be too wet, and in many cases draining the land is advisable, so that it may be ploughed deeply and prepared as if for corn or any other highly cultivated farm crop. It is then ready to receive the cuttings. 697. The slips or cuttings are about two feet long, and should be set perpendicularly in the soil one foot apart, in rows about three feet apart. They should be kept clean of weeds the first year or two, either with the hoe or the cultivator. The osiers may be cut for the first time in about two years after they are set, and may afterwards be cut annually early in the spring. 698. Broomcorn does best in a deep, warm, alluvial soil, such as is best suited to Indian corn. The land should be ploughed in the fall, if sward land, and cultivated in spring, or well harrowed and prepared very much as for Indian, corn. The seed is sown with a seed sower as early in spring as practicable, in hills about two and a half or three feet apart. It is hoed and thinned out soon after coming up, six or eight stalks being left in each hill, and afterwards cultivated between the rows once or twice in the season. 699. When the season is sufficiently long, broomcorn is allowed to grow until the seed is ripe and hard. It is then 198 PLANTS USED IN THE ARTS. lopped or tabled about two and a half feet from the ground, and the top or brush end, with about eight inches of the stalk, are cut off and laid on the tables to dry. It is then stored on open scaffolds under cover until a convenient time, when the seed is scraped from the brush by drawing it through two steel springs. The brush is then bound in bundles of about ten pounds weight, and is ready for market. The seed is valuable for feeding stock. 700. The Hop has generally been considered a valuable crop, profitable in localities where the soil and exposure favored its growth. The most esteemed varieties are the golden, the yellow grape, and the Farnham. 701. The hop requires a deep and rich loam, rather stiff than light, and containing a large proportion of organic or vegetable matter. A dry porous subsoil is also desirable. The quality of the hop will depend much on the soil. It does best in a moist climate. 702. The land devoted to hops should be richly manured, and the use of large quantities of well-rotted barnyard compost, bones, woollen rags and other rich fertilizers, cause it to produce full crops of the best quality. 703. The roots of this plant extend very deep into the soil, and the land should therefore be very deeply ploughed and completely pulverized. The hop is propagated by cuttings or layers, sometimes by sowing the seed. Cuttings which have been rooted in the form of layers, grow more rapidly than more fresh ones. 704. The bines are supported on poles set into the hills. The poles should be from twenty to twenty-five feet long. It is thought by the best hop growers, to be a great mistake to use poles of only twelve or fifteen feet in length as many do, for in general, the yield is much less, and the quality is not so good, while the labor of CULTURE OP TOBACCO. 199 hoeing and picking is as great as with the longer poles. Indeed, it is very seldom that a large crop of first rate hops is obtained from short poles. 705. Hops should be gathered when fully ripe, in August or September. The vines are cut off from one to three feet from the ground, and the poles pulled up and laid over large boxes. The hops are then to be picked perfectly free from leaves and stems, dried in kilns, and pressed into bales. 706. Tobacco is sown in beds made very rich by manuring, to be transplanted in June, or when the leaves are two or three inches long. The soil may be prepared by ploughing in old and well-rotted stable manures, guano and other stimulating fertilizers. 707. Tobacco should be planted early, that it may be cured while the Fig 35 weather is still warm and dry. It is only in this way that a fine quality can be secured. Constant care is necessary to prevent injury from the tobacco worm, shown in figure 35. For this purpose the plants must be frequently examined and the grubs- picked off by hand and destroyed. 708. While still in blossom and before the seed has formed, the plants should be topped, about two and a half feet from the ground, leaving twelve or sixteen leaves to thfe stalk, and all side shoots broken off. 709. When the leaves are thick and spotted, and crack if pressed between the thumb and finger, they are ready for gathering. The plant is then cut, left in the row till the leaves are wilted, and then carried to sheds to be hung up to dry from five to ten weeks. 18 200 ROTATION OF CROPS. CHAPTER XXI. O'P ROTATION OP CROPS. 710. By Rotation of Crops is meant raising a scries of different crops in regular succession. A farmer turns up a lot of his pasture land, and raises, this year, a crop of potatoes ; next year, on the same land, a crop of corn ; next, a crop of rye ; next, clover and grass. This is a common four-fold rotation. The object of rotation in crops is to make a field or a farm, yield, with a certain amount of labor and of manure, the greatest possible amount of valuable crops, with as little exhaustion of the soil as possible. The reason for a rotation of crops is that no two plants, of different kinds, require the same substances, in the same proportion, for their nourishment. The grains and the grasses may soon exhaust the supply of silica. They should, therefore, not immediately succeed eacli other in a rotation. They should be each followed by a crop which needs less of silica but more of potasli or some other mineral salts. A field which would not yield a second good crop of wheat, may, even without manure, give a very good crop of clover, of turnips or of carrots. 711. The Important Principles in the rotation of crops are 1st, that though a soil may contain all the mineral sulislances necessary for the nourishment of every variety of cultivated plants, there is only a limited supply of the mineral food necessary for a particular plant ; 2d, some plants, like the grains, draw their nourishment from near the surface ; others, like carrots and parsnips, draw PRINCIPLES OF ROTATION. — ORDER. — SAVING. 201 much of it from a greater depth ; 3d, some plants, those, namely, which have abundant foliage, draw much of their food from the atmosphere ; others, like the grains, depend more upon the materials contained in the soil. 4th, Par ticular insects live upon certain kinds of plants, certain flies, for example, on grains and grasses, and continue to multiply as long as the same crop occupies the soil from year to year. But when a crop intervenes 011 which these insects cannot live, as beans or turnips, after wheat or oats, then they perish for want of proper nourishment for their young. 712. The order in which crops succeed each other is often of great importance. Weeds are a great injury to all crops, and barnyard manure almost always carries with it the seeds of many pernicious weeds. Such manure should therefore be put into the ground when a crop is to be cultivated, like corn or beets, which may be kept free from weeds by the hoe and the plough or culti vator. When the weeds have been destroyed or nearly destroyed, by a hoed crop, a crop may follow of grain or clover which cannot conveniently be weeded. 713. Much may be saved by rotation. Each crop, in succession, may find in the soil valuable matters which were unnecessary to the preceding crops. Time may be saved, which is more valuable than any crop, for lost time is never found again. We must ascertain what is the best succession of crops, and so arrange the different crops in the different fields, as to occupy all the time of the husbandman and yet not give him too much to do at any one time. With sufficient forecast, this may always be done. Suppose you can keep under cultivation twenty-eight acres. You divide them into seven equal portions, and, 202 ROTATION OF CROPS. if your rotation is one of five years, with grass for two years, call your several fields A, B, C, D, E, F, Gr. A natural arrangement may be something like the follow- Years. On A. OnB. OnC. OnD. OnE. OnF. OnG. 1st, . Potatoes. Corn. C. T., B.* Rye. Clover. Grass. Grass. 2d, . Corn. C.,T.,B. Rye. Clover. Grass. Grass. Potatoes. ;;d, . C.,T.,B. Rye. Clover. Grass. Grass. Potatoes. Corn. 4th, . Rye, Clover. Grass. Grass. Potatoes. Corn. C.,T.,B. 5th, . Clover. Grass. Grass. Potatoes. Corn. C.,T.,B. Rye. 6th, . Grass. Grass. Potatoes. Corn. C.,T.,B. Rye. Clover. 7th, . Grass. Potatoes. ! Corn. C.,T.,B. Rye. Clover. Grass. * Carrots, Turnips, Beets. Iii this way you always have eight acres of grass, four of corn, four of rye, four of clover, four of potatoes, and one or more each of beets, of carrots, and of turnips. 714. Or you may have a still longer rotation, intro ducing, after carrots, parsnips, after beets, cabbages, and after turnips, pease and beans. You may save time in the management of the manure. Tliis may be put in very abundantly before ploughing, and also in the hills for corn, and before beets, carrots and turnips, or before cabbages, parsnips, and pease and beans ; thus being put in once or twice only in the whole course. If mineral as well as other manures are used, with the potatoes may be applied plaster, bones and ashes ; with the corn, barn manure ; with beans; abundant plas ter ; with the roots, guano, or sea manure, common salt, plaster, bones dissolved in sulphuric acid, and ashes. REASONS FOR ROTATION. 203 111 the cultivation of these crops, the ground between the rows should be turned over and stirred as often as possible, — six or eight times at least. The ploughing will then come in this order : earliest, for carrots and beets, next, for potatoes, next, for corn, next, for turnips. The grass-field, for potatoes, may be turned over after hay- harvest ; the ploughing for parsnips may be later and the seed be sown in the autumn. All the hoed crops should be cultivated with the cultivator, the horse hoe or the horse plough, whenever time can be found till the crops are too far advanced to admit of it. Good reasons can be given for the seven-years' course here recommended. Potatoes require large portions of the alkaline salts and of lime. These are succeeded by corn, which requires more of silica, together with alka lies ; then come the roots, which require lime and the alkalies, with a good deal of nitrogen ; after them rye, which calls for silica. This is succeeded by clover, which demands a great deal of lime, and this, by the grasses, which again demand silica and the alkalies. 715. All plants require, but in different proportions, carbonic acid, phosphoric acid, sulphuric acid, the alka lies, potash, soda and ammonia, and lime, magnesia and iron. The acids combine with the other elements of fer tility, and, while the corn is growing, they are preparing, from the particles in the soil, carbonates, phosphates and sulphates of potash, soda, ammonia, lime, magnesia and iron, for the other crops, and new supplies of silica for the grasses. The substances most frequently needed for the restora tion of fertility are ammonia, phosphoric acid and potash, and the most valuable manures, next to barn manure, are accordingly bones and ashes, is* 204 ROTATION OF CROPS. 716. On a field of clover, gypsum in powder, ashes, and bones dissolved in sulphuric acid with one hundred times its quantity of water, always produce gratifying effects. On grass land similar effects are produced hy the use of liquid manure which has run from the manure heap. A poor gentleman in Maryland, suspecting that land which had been worn out by long continued cultivation of tobacco, might be restored by plaster, so as to produce wheat, tried the experiment, which was completely suc cessful. He bought many acres of exhausted tobacco land, and, by fertilizing it with plaster, made himself a rich man. This gentleman, not a man of science, was led to make the experiment by reading Sir Humphrey Davy's Chemi cal Lectures. 717. A Fallow. A field is said to be fallow for a year, when no valuable crop is raised upon it. Such a year is called a year of fallow, and the field itself is sometimes called a fallow. It is sometimes well to let a field lie fallow. A field much infested with weeds may be allowed to lie till the weeds arc well grown or beginning to blossom, when they may be turned under with a plough. This is like giving a coat of manure. When another crop of weeds has sprung up, they may be ploughed in, and this may be repeated as often as there arc any weeds to turn under. These green crops may bo advantageously increased by harrowing in, after each ploughing except the last of the season, seed of some rapidly growing plant, like buckwheat. After a year of such fallow, the field will be likely to be comparatively free from weeds, as most of the seeds of weeds will have sprouted and been destroyed. WEATHERING. — FALLOWS. 205 718. Another benefit comes from the fallow, Weathering. The soil, often turned up, is exposed to the influences of the air, and to sunshine, rain, cold, and wind. From the air it receives oxygen, carbonic acid and ammonia, which are either employed in rendering soluble the mineral salts lying in the soil, or are laid up in the geine of the soil for the use of future crops. These salts lie concealed in small stones or minute par ticles of the rocks. In mica and felspar, for example, which are ingredients in granite, there are potash, alu mina, magnesia and iron, as well as silica, and sometimes soda and lime, all essential elements in the food of plants. 719. The old Greeks and Romans often allowed their fields to lie fallow, and found them thereby rendered more fertile ; and the same is done, for the same reason, by many nations in the South of Europe. But the intro duction of Indian corn, potatoes and other roots, has rendered it less necessary, and where land is very valu able, fallows are generally discontinued, the benefits of weathering being secured by deep ploughing and by fre quent tillage between the rows of the standing crops. The same rotation is not suited equally to every kind of soil. On the sandy soils of New England, abundant in silica, Indian corn, rye and the grasses naturally occupy more space than they would in a soil rich in lime. In such a soil as the last, wheat might take the place of rye and of Indian corn. 720. The farmer must find out, from the experience of others or from his own observation, what course is best for the particular soil he cultivates, and the particular object he has in view. One may choose to keep sheep, another, only cattle for the market, another, cows for the dairy. A farmer 200 ROTATION OF CROPS. living near a large market would pursue a course very different from one at a great distance. He would natu rally make his farm resemble a large market garden. 721. Other Rotations. Usually a field laid down to grass may be profitably kept for mowing for several years. This being understood, and also that grass seed may often be conveniently sown with clover, either of the following may be an advantageous course : — I. — 1, corn ; 2, beets ; 3, rye ; 4, clover ; 5, grass. II. — 1, potatoes ; 2, corn ; 3, carrots ; 4, cabbages ; 5, beets ; 6, clover and grass. III. — 1, potatoes ; 2, beets ; 3, beans ; 4, cabbages ; 5, parsnips ; 6, corn ; 7, clover. IV. — 1, tomatoes ; 2, squashes ; 3, carrots ; 4, pease or beans ; 5, cabbages ; 6, clover. V. — 1, turnips; 2, parsnips ; 3, corn ; 4, potatoes; 5, rye ; 6, clover ; 7, grass. For a long course, 1, potatoes ; 2, beets ; 3, squashes or melons ; 4, carrots ; 5, wheat ; 6, parsnips ; 7, rye ; 8, turnips ; 9, buckwheat ; 10, corn ; 11, clover ; 12, grass. It is found by experience that corn does not well follow turnips. 722? The famous Norfolk, (Eng.,) rotation is 1, tur nips ; 2, barley ; 3, clover ; 4, wheat. A favorite rotation in France is for the 1st year, winter wheat, 20 acres. 2d year, beets, carrots, potatoes, 10 acres ; poppy or flax, 5 acres ; colza, 5 acres. 3d year, oats and spring wheat, 10 acres ; fall wheat, 5 acres ; turnips, 5 acres. 4th year, clover or leguminous vegetables, 20 acres. Poppies and colza are a special object of cultivation in France. From the seeds of both oil is made for light and for culinary use. THE HAY CROP. 207 On rich clayey soils in England, a course which has been much used is 1, oats ; 2, rape, for oil ; 3, beans ; 4, wheat sown with clover ; 5 and 6, clover ; 7, wheat ; 8, rape. In rich loams, 1, oats ; 2, turnips ; 3, wheat or barley ; 4, beans ; 5, wheat ; 6, fallow or turnips ; 7, wheat or barley «and grass seeds. But it must be remem bered that the climate of England does not ripen Indian corn. 723. Rotation of crops is not indispensable. It may be the best economy, on the whole, of manure, of time and of labor. But the farmer who knows the precise use and value of the several mineral and other manures, may substitute, for a rotation of crops, a rotation of manures, which will enable him to grow, on the same field, again and again, the crop which may be most profitable for him or most in demand in his market. CHAPTER XXII. * '•' THE HARVEST. 724. The hay crop is usually the first of the harvest that requires attention. Before he can determine the proper time for mowing, the farmer must consider for what purposes his hay is to be used — whether he is to feed cows in milk, horses and working oxen, or young stock with it. 725. If it be used for feeding milch cows, it should be cut earlier than if it is intended for some other kinds 208 THE HARVEST. of stock, and at such a time and in such a manner as to preserve its juiciness and leave it as much like the green grass of the pasture as possible. 726. If it is to be fed to cows in milk, and the farmer wishes to get the greatest quantity of milk, grass should be cut just before coming into blossom. »It is then most juicy, and will therefore produce a greater flow of milk than if allowed to stand longer. If the object is to secure the best quality of milk, with less regard to quantity, it may be cut in the blossom. 727. For feeding to store cattle, the grasses may be cut when in full blossom ; for horses at work and for fattening cattle, it is better just after it has passed out of Mi'1 blossom, or when the seed is said to be in the milk. 728. Grasses attain their full development at the time of flowering, and then contain the largest quantity of soluble materials, such as starch, gum, and sugar ; these, with the nitrogenous compounds which are also most abundant at this time, are of the highest value for supplying nutriment to animals. 729. After flowering, and as the seed forms and ripens, the starch, sugar, &c., are gradually changed into woody fibre, which is nearly insoluble and imiutri- tious. 730. This fact is well established, and shows that grasses in general should not be allowed to stand after the time of flowering. There is, indeed, a great deal of nourishment in the ripe seed ; but not enough to make up for the loss in the stalk and leaves, if the mowing is put off till the seed is ripe. Grasses fully ripe will make hay little better than straw. 731. Grass is cut cither by hand with the common scythe, or by lliu mowing machine, (Fig. 3G.) With the THE MOWING MACHINE. 209 former, a good mower will go over an acre a day. With the latter, 011 smooth land, two horses and one man will mow at the rate of an acre an hour, or from ten to twelve acres a day, without over-exertion. Fig. 36. 732. Besides mowing so much faster, the machine also spreads the grass evenly, saving the labor of spreading by hand. It also enables the farmer to cut all his grass nearer the proper time, and he is not obliged to let a part of it stand till it is too ripe. 733. After being cut, the grass should be frequently spread and turned, so as to dry as rapidly and as uniformly as possible. This may be done by hand with a common fork, or by a machine called a hay-tedder, a light revolving cylinder set with tines and drawn by one horse, by means of which the grass may be constantly stirred and kept in motion, and much time and labor may be saved. 734. When grass is partially or wholly cured, it may be raked by hand, or by a horse-rake, (Fig 37.) Raking 210 THE HARVEST. by hand is easy but slow, and thrifty farmers now generally use the horse- rake whenever they can. With the horse-rake, one man and horse can do as much work as ten men can in the same time without it. Hay cut in the forenoon should be raked before night, that it may not be exposed to the dews. 735. The time required for curing hay depends partly on its ripeness when cut, and much on the state of the weather. In good weather, if machinery is used, it may be cut in the morning after the dew has risen, and dried so as to be put into light cocks early in the afternoon, or before the dews of evening. A slight opening to the sun for an hour or two the next day should dry it enough, if it was cut while in blossom or before. Hay should be got in during the heat of the day. 736. Grass cured rapidly and with the least exposure, is more nutritious than that cured more slowly and longer exposed to the sun. If dried too much, it contains more useless woody fibre and less nutriment. The more succulent and juicy the hay, the more it is relished by cattle. 737. After the grass has been cut at the proper time, the true art of haymaking consists in curing it just enough to make it fit for storing away, and ,110 more. The loss of the nutritive substances, which make the hay most valuable, is then stopped at the earliest moment. It is as great a mistake to dry grass too much, as to let it stand too long before cutting. 738. If the hay has not been perfectly dried, and there is danger that it may heat in the mow, it is well to have CURING OF CLOVER. 211 alternate layers of the new hay and straw or old hay. In this way the heating may be prevented, and the straw or old hay will be so far flavored and improved, as to be relished by stock of all kinds. If there is much reason for apprehension, four quarts of salt to the ton may be sprinkled in. 739. Experience has shown that hay properly dried is not likely to be injured by its own juices alone ; if it has been exposed to rain, it should never be put into the mow until it has been thoroughly dried. 740. Clover should be cut immediately after blossoming and before the seed is formed. It should be cured in such a manner as to lose as little of its foliage as possible, and therefore cannot be treated exactly as the natural grasses are. It should not be long exposed to the scorching sun, but after being wilted and partially dried, it should be forked up into cocks and left to cure in this position. The fourth or fifth day, when the weather is fair and warm, open and air it an hour or two, and it will then be fit to cart to the barn. 741. Clover cured in this way without loss of its foliage, is better for milch cows and for sheep than any other hay. It may also be fed to horses that are not hard worked, or to young stock, but it is most valuable for cows in milk. For other farm stock it is worth from two-thirds to three- fourths as much as the best hay. 742. If there is reason to fear that it is not sufficiently cured when stored away, it may be mixed with old meadow or swale hay or straw, putting first a layer of hay or straw, and then one of clover. Stored in this manner, cattle will eat both the hay and clover very greedily. 743. Lucerne should be cut as soon as it begins to flower, or even earlier. If allowed to stand later, it 19 212 THE HARVEST. becomes coarse and hard with much woody fibre, and is less relished by cattle. It is cured and used like clover. 744. The proper time to cut both wheat and rye is when the straw begins to whiten and shrink just below the head. This change will commence a week or more before they are fully ripe, and shows that the grain has ceased to receive nourishment from the roots. If taken in before getting dead ripe, it makes more and whiter flour, and the waste from shelling out is avoided. Wheat may be cut with the sickle, with the cradle, (Fig. 38,) or by the reaping machine, very similar in appearance to the mowing machine. A reaper in op» 'ra tion is shown in figure 39. 745. All the grain crops may be cut in the same manner, but oats and barley are most commonly mown and dried the other grains are more Fig. 38. Fig. 39. somewhat like hay, while frequently cradled or cut with the machine. 746. Indian corn should be gathered when the ears arc trla/.rtl, hut not perfectly hard. It is customary in many parts of New England, to cut the tops above the ears a little bd'oiv I his lime, and when the stalks are still rather green. The corn is afterwards cut up near the ground, and taken to the barn to be husked. In other sections TREATMENT OF POTATOES. 213 the practice of cutting up at the ground and stocking, prevails. This is done after the kernel has become glazed, yielding but little juice when broken open, and when the leaves have begun to turn, but are still green. This practice saves labor, and adds to the quantity of fodder, and preserves its nutritive qualities better. 747. Potatoes should usually be dug in October. They may be thrown out by a furrow of the common plough, or with the spade or hoe, but the eight-pronged manure fork is better than either. They are liable to be injured by lying in the sun after they are dug, and if exposed to its direct rays are apt to lose their mealiness. But if kept in the shade until they are put into the cellar, they continue mealy much longer. 748. If the tuber of the potato while growing is exposed to the light and air by lying near or on the surface, it becomes disagreeable to the taste, green and waxy, and sometimes even poisonous, and when cooked will be found to be soggy. The effect produced on potatoes lying in the sun after digging is a little like this, though much less in degree, perhaps, on account of the shorter time they arc exposed. But seed potatoes may be exposed to the sun before planting with great benefit. 749. The harvesting of turnips should be commenced in the early part of November. The Swede or ruta-baga, may be lifted out of the ground, the tops cut and the roots stored in a cool, airy cellar. The tap-root may be cut off to prevent sprouting in the cellar. 750. Carrots may remain in the ground till the late hard frosts, or till the early part of November. They may first be topped in the ground by running a sharp hoe or knife, (Fig. 40,) along the rows, and then may be raised with the common hand-fork, or a deep furrow may 214 DISEASES AND ENEMIES OF GROWING PLANTS. be made by the plough run ning as near as practicable to each row, after which they F. 40 may be easily thrown out. After drying sufficiently, they arc ready to be removed to the cellar. Parsnips may be taken up in the same way, or a part of the crop may be left in the ground till they are wanted to use, in spring. 751. Mangolds should be pulled and stored with as little bruising as possible. The least injury will some times cause them to decay. If properly harvested, this root keeps well till late into spring. CHAPTER XXIII. DISEASES AND ENEMIES OF GROWING PLANTS. 752. Disease is the result of deranged vital action. It is brought about both by predisposing and by exciting causes. 753. Whatever diminishes the natural vigor of the plant, but does not of itself produce a specific form of dis ease, as excessive stimulation, want of proper nourishment, and the propagation of any species for many years without mix ing with other varieties of the same species, or in common Inngusip1, not changing the kind of seed planted, is a predisposing cause. 7-~il. An exciting cause of disease is one which acts suddenly upon the previously debilitated plant, and REMEDY FOR MILDEW. 215 produces such a change in its vital action as to excite a distinct form of disease, as sudden changes of temperature, or of the electrical condition of the atmosphere, hot and damp weather at unusual periods of the season ; also, sometimes, mechanical violence. [NOTE. — Fungi and insects have, by some, been con sidered as exciting causes of disease, while others regard them as resulting from previously existing disease.] 755. Among the diseases in which parasitic plants appear, or which are caused by parasitic plants, may be mentioned mildew, blight or red rust, smut and ergot. 756. The term mildew, or meal dew, is most properly applied to the mould or fungous growth on the leaves of trees and some forage plants, in the shape of white mealy patches. 757. But it is most commonly applied to a disease in wheat and barley, also called rust. It appears in the shape of small spots of dingy white, oblong in shape, showing itself first on the upper side of the leaf, but soon on the lower side and the stem also. The white mildew attacks many species of plants, especially roses, peaches, hops, vines, pease, the maple tree, &c. 758. It is first seen as round white or yellowish mealy spots, composed of very delicate creeping threads. As the disease develops, these spots throw off spores or cells, which attach themselves to other plants and produce similar fungi or spots on them. There is no other change in the appearance of this disease, and no change in color. The oidium of the vine is a kind of white mildew. 759. The simplest and most effectual remedy for this is to take a lump of stone lime of two or three pounds weight, and about the same quantity of sulphur. Pour hot water on them, which, by the slacking of the lime, 19* 216 DISEASES AND ENEMIES OF GROWING PLANTS. causes both to dissolve readily in water. This is sufficient for a barrel of water, and when used may be filled up again. It may be applied with a syringe or sprinkling pot to the foliage of affected plants. Sulphur vapor is also a certain remedy for mildew for plants or vines under glass. 760. The wheat mildew is very different in its nature from that found on trees or vines, which may be called the white mildew, though its effects are somewhat similar. 761. The white varieties of wheat appear to be more liable to the mildew than the red or spring varieties, and the bald more than the bearded. The most vigorous plants are most frequently attacked and suffer the most, and the disease is more destructive to plants which are headed out than to younger ones. Figure 41 shows the appearance of an car of ripe wheat covered with mildew. 762. After the spots of wheat mildew have extended over the whole plant, they assume a rusty color, and throw off a fine dust which is yellowish at first, but soon turns brown and Flg' 41< rusty by exposure. Hence the disease often goes by the name of rust. 768. Wheat growing on low, undraincd lands, with a peaty or calcareous soil, is most liable to be attacked by mildew, but this disease often appears on sandy soils and on the stiffest clays, especially when a few days of damp, i'oooy -weather, are followed by a hot sunshine. 7!' bringing up tin- subsoil ? — 151. Adv;m: of deep ploughing? — 452. Whore is it especially necessary? — 453. QUESTIONS. 285 What is the design of the subsoil plough ? — 454. Benefits of subsoil ploughing ? What do recent investigations show ? — 455. What is the Michigan plough ? — 456. What is the digger ? — 457. How is the harrow used ? — 458. How does the cultivator compare with the harrow ? — 459. How is the roller used ? — 460. How is it useful in laying down land ? — 461. What caution is needed ? Effect of rolling stiff soils ? CHAPTER XV. — 462. What conditions are requisite to germination ? How does light affect germination ? — 463. What is the first process ? — 464. How does the plant grow ? — 465. How does it draw food from the air ? What office do the leaves fulfil ? How numerous are the breath ing pores of the leaves ? — 466. What do plants usually spring from ? What is a tuber ? What is a bulb ?— 467. What is a seed bed ?— 468. What do all plants require for their complete development? What points is it necessary to attend ? — 469. Can an imperfect seed grow ? — 470. What is the advantage of perfect seed? — 471. How may good seed be known ? — 472. How may the germinating power of seed be ascertained ? — 473. What advantage is there in learning the quality of the seed ? — 474. How does the vitality of seeds differ ?-'-475. How can the appearance of plants on new soil be explained ? — 476. How is it with seeds of the turnip and the grasses ? — 477. What change takes place in seeds? How can deterioration be prevented? — 478. Why is change of seed necessary ? — 479. When may a change be avoided ? What care is requisite to preserve the purity of seeds ? — 480. What common examples can be given of seeds producing fruits different from those which produced them? — 481. How may varieties be obtained ?— 482. Plow may varieties of Indian corn be produced ? — 483. Is a modification of the original fixed at once ? — 484. How is it in cul tivating potatoes ? — 485. How may new varieties of the potato be pro duced ? — 486. Is any new variety obtained from layers, or in grafting or budding ? — 487. How may we judge of the quantity of seed required ? — 488. How is the seetl required influenced by the soil ? — 489. What other conditions affect the quantity of seed required ? — 490. How does the mode of sowing affect it? — 491. How is it with thin and thick sown crops ? — 492. When may steeping seeds be practiced ? — 493. What is best adapted to nourish the germ of plants ? — 494. What circumstances affect the time of planting ? — 495. How does the condition of the soil affect the time of sowing ? — 496. la there any general rule applicable to all crops ? — 497. To what depth should seeds be covered ? — 498. The depth of clay and sandy soils ? — 499. How does the size of seeds affect the depth of covering? — 500. What are some of the modes ot' 286 QUESTIONS. drill sowing? — 502. How arc seeds covered? — 503. How is Indian corn planted ? — 501. How is the manure applied ? — 505. What is transplanting ? — 506. What advantages has this mode of culture ? — 507. What is needed to transplant successfully? — 508. At what stage of growth is transplanting to bo performed ? — 509. What care is required in transplanting older trees ? — 510. How may injury to the roots be remedied? — 511. How does the removal of part of the top affect the tree ? — 512. How may trees and shrubs be grown ? CHAPTER XVI.— 513. How are cultivated plants divided ?— 514. What do the cereals include ? Is buckwheat a cereal plant ? — 515. What is one of the most important of cereals ? — 516. What soils does Indian corn require ?— 517. How is the land prepared ? — 518. How is it with stiff soils ? — 519. What manures should be used for this crop ?-*- 520. How are they to be applied? — 521. Manure having been applied in the fall, what course is adopted in spring ? — 522. What is the objec tion to putting all the manure in the hill ? — 523. Another objection ? — 524. How may concentrate! manures be used to advantage ? — 525. How may the land be put into good condition ? Why is it poor economy to raise poor crops ? — 526. What is of special importance r— 527. What is the next step ? — 528. Distance of the hills for corn ? Advantage of .using the corn-planter ? — 529. Why should the plants stand closely ? — 530. When may soaking the seed be resorted to ? What is the best substance to soak seed corn in ? — 531. Is drill planting recommended ? — 532. How deep is it covered ? — 533. When is the crop first hoed ? What implement is used between the rows, and how? — 534. What implement is used in subsequent hoeings, and why ? — 535. How many hoeings are necessary for corn ? — 536. How is the seed to be selected ? — 537. When are the top stalks cut? Effect of cutting too early? — 538. What is the better practice ? — 539. The cheapest way of stocking ? — 540. What are the varieties of wheat? — 541. How does winter differ from spring wheat ? — 512. What soil is adapted ft wheat ? — 543. What is requisite in the soil? — 544. What preparation of land is needed? — 545. How is it sown ? — 546. What are the advantages of drill sowing ? — 547. Are there any other advantages ? — 548. What quantity of seed is sown per acre ? — 549. Where does wheat come in the rotation ? — 550. What is important? — 551. When is it harvested? — 552. What takes place if harvesting is neglected ? — 553. Effect of exposure to rain ? — 554. What is said of rye ? — 555. Soils adapted to rye ? — 556. The varieties? How does its range of culture compare with wheat? — 557. Quantity of seed per acre ? — 558. Its use on sheep farms ? — 559. What of its straw ?— 500. What disease attacks rye?— 561. Peculiarity QUESTIONS. 287 of barley ? What soils does it require ?— 5G2. When is it to be sown ? —563. When is it harvested ? — 564. What climate is best adapted to oats ? — 565. How does the yield differ in different circumstances ? — 566. How may they be sown ? Quantity of seed per acre ? — 567. How are oats for a green crop ? — 568. Effect of the roller on them? — 569. When should they be cut, and how? — 570. How are oats used? — 571. What is said of buckwheat ? — 572. Where is it cultivated ? — 573. What soils does it do best on ? How is it often used ? — 574. How is the land pre pared for it ? When is it sown ? Quantity of seed per acre ? — 575. How is it cut and gathered ? — 576. How is millet used ? — 577. Soils best adapted to millet ? — 578. When is millet sown ? CHAPTER XVII. — 579. What does the class of leguminous plants include ? Why so called ? — 580. The most important of the legumi nous plants ? What are the varieties of the bean ? — 581. Soils best adapted to beans ? — 582. How is the land prepared ? How thick should they be planted ? — 583. When are they to be planted ? — 584. When hoed and how ? — 585. How does the season affect the crop ? — 586. When is the crop to be harvested and how ? — 587. What yield may be expected ? — 588. The varieties of the pea ? — 589. The soil best adapted to pease ? — 590. What manures are used for them ? — 591. What cultiva tion is required ? How are they sown ? — 592. How are they harvested ? For what purpose is the pea often sown ? — 593. By what is it attacked ? — 594. What remedy is there ? — 595. What is the objection to late plant ing ?— 596. What is said of the lentil ?— 597. What soils does the lentil require ? — 598. What is said of the vetch ? CHAPTER XVIII. — 599. How may the potato be raised ? — 600. When should seed potatoes be gathered? — 601. The varieties of this plant? 602. What is a prominent constituent of the potato ? — 603. When is starch the most abundant ? — 604. What soils are best for potatoes ? — 605. What cultivation is required ? — 606. What manures ? — 607. What of the practice of cutting ? — 608. What after-culture is necessary ? — 609. When is the crop harvested and how ? — 610. What is the climate for the turnip? How do droughts affect it? — 611. Advantages of its culture ? — 612. How should crops alternate ? Effect of the root crop on the soil ? — 613. Varieties of the turnip ? — 614. Soils best adapted to it? — 615. What preparation of land is necessary? — 616. Effect of poor soils on the quality of the turnip ? Manures best adapted to the turnip ? — 617. Effect of nitrogenous manures on the turnip ? — 618. How is the turnip sown? Objection to ridge culture ? — 619. Quantity of seed per acre ?— 620. What is the after-culture ?— 621. When are 25* 288 QUESTIONS. turnips harvested and how? — 022. How are they used? What quantity may be given to an animal ? — G23. What is the kohl-rabi and how is it cultivated? — 624. Soils adapted to the cabbage ? — 625. Varieties of the beet ? — 626. What of the mangold ? — 627. How is land prepared for beets? How is the seed sown ? — 628. What does the after-culture con sist in ? — 629. When is it harvested ? What care is required ? — 630. What is said of the carrot? — 631. How is the carrot used? — 632. How is the carrot cultivated ? — 633. What are the varieties of it and the qualities of each ? — 634. The climate best suited to it ? Effect of droughts upon it ?— 635. Soils best adapted to it ?— 636. What cultiva tion is of importance ? — 637. Effect of stimulating manures on it ? — 638. What of the seed ? — 639. Quantity of seed per acre ? Depth of covering? — 640. Preparation of land ? Time of sowing ? — 641. When is it to be hoed ? Number of hoeings required ? — 642. What about thinning out ? — 643. When is the carrot harvested ? — 544. What is said of the parsnip ? — 645. How does it compare with the carrot ? — 646. Varieties of the parsnip ? — 647. Climate best suited to it ? — 648. Soils ? — 649. Preparation of the land? — 650. Its yield compared with the carrot ? — 651. What of the artichoke ? Advantages of its culture ? — 652. Cultivation ? — 653. How is it harvested and used ? CHAPTER XIX. — 654. Origin of the culture of grasses? — 655. Classification of grasses ? What are the natural grasses ? — 656. What are artificial grasses ? — 657. Design of laying down lands with the natural grasses ? — 658. What is the common practice ? — 659. How do the natural grasses grow ? — 660. Where is pasturage the only improve ment practicable ? — 661. What differences are found in the grasses ? — 662. Advantages of using several species together? — 663. How is a selection made ?— 664. What are some of the best grasses for mowing lands ? — 665. What species are best adapted for pastures ? — 666. What point is of importance in the selection for mowings ? — 667. How does the time of blossoming affect the mixture for pasture grasses ? — 668. Climate best adapted to bring the grasses to perfection ? How do the grasses of a dry climate or dry season compare with those of a moist one ? — 669. Best time to sow grass seed ? Objection to spring sowing ? — 670. Preparation of the land? — 671. How is the seed sown ? Deptli of covering? — 672. Time of sowing on a clp.yey soil? — 673. When is clover seed sown ? — 674. What are the artificial grasses ? — 675. The most valuable of the artificial grasses ? Effect of clover roots on the soil ?— 676. Soils best adapted to clover ?— 677- What is said of the white or Dutch clover ?— 678. How is lucerne affected by the climate of this country ? QUESTIONS. 289 CHAPTER XX. — 679. How arc plants used in the arts divided ? — 680. What is the only plant cultivated for its oil in this country ? — 681. In what climates does flax succeed best ? The soils best suited to it ? — 682. How does the object of raising flax determine the soil for it ? — 683. What manures are good for it ? — 684. What preparation of the land ? — 685. The quantity of seed to be sown ? — 686. Effect of quantity of seed on the fibre ? Kind of fibre most valuable ? — 687. How is the seed sown ? What care is needed after the flax is up ? — 688. How is the plant gathered ?— 689. If allowed to ripen seed how much may be expected per acre ?— 690. What is said of hemp?— 691. The soil best adapted to hemp ? — 692. How is it sown ? When and how is it harvested ? — 693. What other plants are used in our manufacturing industries ?— 694. What are the varieties of osier willows ?— 695. What soils are adapted to the willow ? — 696. How is the land prepared ? — 697. How are the cuttings set ? What attention is needed ?— 698. The soil best suited to broomcorn ? How is the seed sown ? — 699. When and how is it harvested ? — 700. What are the varieties of the hop ? — 701. The soil best adapted to it? — 702. What manures maybe used? — 703. How is the hop propagated ? — 704. What is said of the poles to be used ? — 705. When are hops gathered and how ? — 706. How is tobacco cultivated ? — 707. By what is the plant attacked ? — 708. When is it topped ? — 709. When gathered and how ? CHAPTER XXI. — 710. Rotation of crops ? Give an example. Object of rotation ? The reason for rotation ? First important principle in the rotation of crops ? The second? The third ? Fourth? — 711. Is the order of rotation important ? — 712. What may be saved by rotation ? How must the succession be arranged ? Show, by an example on the black-board, how this may be done. — 713. How may the rotation be made still longer ? How may time be saved ? How often should the ground be moved ? Order of ploughing ? Give reasons for the seven years' course ? Substances most needed for the restoration of fertility ? Best manures ? — 714. On clover ? Give an example of successful use of gypsum ? — 715. A fallow ? When may a field lie fallow ? Show how it should be managed ? — 716. Weathering ? Its uses ? Where are these salts ? — 717. Who have allowed thoir fields to be fallow ? What has rendered it less necessary ? What substitute ? Why should the rotation vary with the soil ? — 718. How is a farmer to know the best course of rotation ? Should it vary with the object the farmer has in view ? — 719. Give, upon the black-board, the 1st course laid down, with the reasons. 2d. 3d. 4th. 5th. Give a longer course, and the reasons. — 720. Norfolk rotation? Give the favorite French course, 290 QUESTIONS. with the reasons. Give an English course for clayey soils. For rich loams. What fact should essentially vary these courses when adopted in America ? — 721. What may sometimes be substituted for a rotation of crops ? CHAPTER XXII.— 724. What is the first of the harvest? What determines the proper time for cutting grass ? — 725. When should it be cut for feeding to milch cows ? — 726. When to obtain the greatest quantity and the best quality of milk ? — 727. When to feed to store cattle ? — 728. When do grasses attain their full development ? What constituents of grass are of the highest value ? — 729. What change takes place after flowering ? — 730. Why not let the seed ripen ? — 731. How is grass cut? What is the advantage of the mowing machine- r — 732. What further advantage is there ? How is grass treated after being cut ? What is the hay tedder ?— 734. How is it gathered ? What is the advantage of the hors.e-rake ? — 735. On what does the time required to cure grass depend ? When may it be got in ? — 736. What is the effect of over-drying ? — 737. In what does the true art of hay making consist ? — 738. How may injury in the mow be prevented? — 739. What is the result of experience in drying hay ? — 740. When should clover be cut and how cured ? When may it be put in ? — 741. How does clover compare with other hay ? For what is it most valuable ? — 742. How may it be saved from injury ? — 743. When should lucerne be cut and why ? — 744. When is the proper time to cut wheat and rye ? When then ? How are they cut ? — 745. How are oats and barley cut ? — 746. When should Indian corn be gathered ? What is the custom ? — 747. When should potatoes be dug and how ? What is the result of exposure to the sun ? — 748. What is the effect of expo sure to the sun on the surface while growing ? — 749. When are turnips harvested and how ? — 750. When should carrots be taken out of the ground and how ? — 751. .What is said of mangolds ? CHAPTER XXIII. — 752. What is disease ? How is it brought about ? — 753. What is a predisposing cause of disease? — 754. What is an exciting cause ? — 755. What are some of the diseases often ascribed to parasites ? — 756. What is mildew ? — 757. What is the appearance of wheat mildew ? What plants does the white mildew attack ? — 758. How does white mildew first appear? How does it extend? — 759. What is the remedy ? — 760. Is wheat mildew the same as that of the vine? — 761. What varieties of wheat are most affected with it? — 762. What gives it the name of rust ? — 763. On what soils is wheat most liable to be attacked t — 764. What is the remedy ? — 765. When may QUESTIONS. 291 salt 436 applied? — 766. What is the disease called smut? — 767. How does it affect the grain ? — 768. On what soils is smut most common ? — 769. How may its presence in wheat be known ? — 770. What are the remedies ? — 771. How may the seed be prepared ? — 772. What is the disease called canker ? — 773. What is this disease caused by ? — 774. What is its peculiarity ? — 775. How is it propagated ? — 776. What is the condition of the diseased grain at the time of ripening ? — 777. How does it appear in threshing ? — 778. How may it be guarded against? — 779. How may awash be prepared for the seed ? — 780. What is blight ? —781. What is ergot?— 782. What is it caused by ?— 783. Where does it prevail ? — 784. What is the remedy ? — 785. How are trees often injured? — 786. When may fruit trees be pruned? — 787. How should wounds on trees be treated ? — 788. What are some of the mos£ injurious insects ? — 789. What are cut worms ? — 790. How may they be destroyed ? — 791. What other insects destroy them ? — 792. What is said of ground beetles ? — 793. What of ichneumon flies ? — 794. How may the apple-tree caterpillar be guarded against ? When are the eggs laid and how do they appear ? — 795. How may trees be protected from the canker worm ? — 796. What about the codling moth ? Remedy ? — 797. What does the curculio attack ? How may the bitten fruit be known ? What prevention is named ? — 798. What of the apple-tree borer ? How does it enter the tree ? — 799. When are the eggs hatched ? How is it checked ?— 800. What are the remedies ?— 801. What does the striped beetle attack ? How may its ravages be prevented ? — 802. How may squash bugs be destroyed ? — 803. What of the onion maggot ? —804. Of the wheat midge ?— 805. The dor bug ?— 806. Of the locust- tree borer? How is it destroyed ? — 807. Of the rose bug ? — 808. How may the spring beetle be recognized ? Of what is it the parent ? — 809 What of the striped potato beetle ? Remedy ? — 810. The oak pruner ? How prevented?— 811. Of the mealworm? — 812. Of scale insects on the bark? Remedy? — 813. Of the chinch bug? How destroyed? — 814. The army worm ? Its enemies ? How checked ? Their history ? —815. What of plant lice ? On wheat ? CHAPTER XXIV.— 816. Of what does the stock of the farm consist? — 817. Objects of keeping horned cattle ? — 818. How divided ?— 819. How many distinct breeds in this country ? — 820. Their qualities ? — 821. Of the Ayrshires ? Why kept? Their milk?— 822. Of the Jer seys ? — 823. What of the Short-horns ? — 824. Where did they origi nate ?— 325. What of the Devons ?— 826. Of the Herefords ?— 827. What of the common stock ? — 828. Why should only good stock be kept on the farm ?— 829. On what does success depend ?— 830. Nutri- 292 QUESTIONS. ment animals require ? — 831. Difference in a full grown and a growing animal ? — 832. Treatment of young stock ? — 833. Common mistake ? — 834. Consequence ?— 835. Treatment of cows ?— 836. What is of most importance ?— 837. What of moist food in winter ? — 838. How fed to produce the greatest quantity ? — 831). For the best quality ? — 840. How to feed for cheese making? — 841. What of the manner of milking? — 842. What is the best form of the animal to fat ?— 843. How should fattening animals be treated ? — 844. State an experiment on sheep. — 845. How may the greatest quantity of manure be made ? — i>4(>. Difference in ground and unground food ? — 847. How is a fat animal prepared for the butcher ? — 848. What is the average loss or offal ? — 849. Qualities of working cattle ? — 850. Comparison of ox and horse labor ? — 851. How are horses classified ? — 852. Effect of standing in dark stables ?— 853. How treated ?— 854. What of barns and stables ?— 855. How is good ventilation secured ? — 85G. Of the temperature of stables ?— 857. What is said of treatment of animals ?— 858. What of the breeds of sheep ? — 859. Most profitable for special localities ?— 860. Comparative profit of raising mutton? Of cost of fences ? — 861. Of shelter ?— 862. State an experiment in keeping sheep ?— 863. What is said of feeding ? — 864. Amount of food consumed ? — 865. How may sheep be protected ? — 866. Of the breeds ? On what will the choice depend ?— 867. What of the food of swine ?— 868. What of poultry ?— 869. What of their food in winter ?— 870. What of the varieties of fowls ? CHAPTER XXV.— 871. On what will success depend ?— 872. What of choice of location ? Advantage of good land ? — 873. What is said of the location of buildings ? — 874. Of the construction of fences ? — 875. Of the economy of implements ? — 876. Of buying too many ? — 877. Of the more expensive ones ? How may they be'owned ? — 878. How are farm tools injured ? — 879. What is said of the tool room ? — 880. What mistake is often made ? On what does profit depend ? — 881. What is the result of trying to do too much ? — 882. What is said of protecting crops ?— 883. Of the care of growing corn ? — 884. What is true of every crop ? — 885. A source of great loss ? — 886. How is the farmer to keep up the fertility of his land ? — 887. How are knowledge and skill required ? — 888. How is a compost formed ? — 889. The most direct way of increasing fertility ? — 890. Economy of green fodder ? Of manure ?— 891. Of losses from badly wintering stock?— 892. What of waste land along walls ?— 893. Of allowing stones to lie in piles on the lot ?— 894. What is said of a garden ? Economy of it ?— 895. Of a hot-bed ?— 896. When is it made ?— 897. How is the frame constructed? QUESTIONS. 293 — 898. How are the sashes put on ? — 899. What exposure is best ? When is the bed started ? — 900. Best heating material ? How put in ? —901. How may the heat be protracted? — 902. Management ?— 903. How is the seed sown ?— 904. How may too great heat «be avoided ? — 905. How else ? — 906. How may the temperature be determined ? — 907. What caution is required? — 908. How may cucumbers, &c., be planted? — 909. What plants may be started in the hot-bed ? — 910. What hot beds are most easily regulated ? — 911. What is said of fruit culture ? — 912. Of young trees ? Of other crops ? — 913. How is a too thrifty growth chocked? How is the growth promoted ? What of spading up around trees? — 914. What of pruning? Best time? — 915. When should apples and pears be gathered ? Effect of ripening on the fruit ? — 91(J. What is said of the strawberry? — 917. Of the raspberry and blackberry ? — 918. Of the gooseberry ? Value of mulching ?— 919. When should grapes be set? When pruned? Object the first year or two ?— 920. Effect of ornamental trees ?— 921. When should wheat and other grains be harvested ? — 922. Effect of ripening ?— 923. What is said of oats? — 924. Of keeping correct accounts? — 925. What accounts should be kept ? Result ? CHAPTER XXVL— 926. What of the importance of good manage ment in the house ?— 927. Of the dairy ?— 928. Of the care of milk ?— 929. What is milk ? Its composition ?— 930. The proportions of the various constituents ? — 931. How does it appear under the microscope ? What are the globules ? Their size ? — 932. Weight of milk ? Effect of heat and cold ? What change takes place when at rest ? — 933. What is the cause of a whitish appearance in cream ? — 934. Why is churning necessary ? What sometimes takes place ? — 935. Effect of heat on milk ? — 936. What is the percentage of cream ? Which is lighter, rich or poor milk ? — 937. Temperature of new milk ? Depth in the pan) Temperature of the dairy-room ? — 938. Why is the strictest cleanliness necessary ? — 939. What of the first cream that rises ? How may the best cream and butter be obtained? — 940. Of the dairy house? — 941. How should the room be located in the house ? What of cellars ? — 942. Of the atmosphere near cellar bottoms? Where should milk stand to facilitate the rising of cream ? — 943. Describe a convenient form of milk stand.— 944. How long should milk stand for cream ? What of churning ? How may cream be kept ? — 945. What is said of butter ? At what temperature of the cream is the best quality of butter procured ? How much does the temperature rise in churning ? How may the cream be brought to the proper temperature ? — 946. What of churning ? — 947. What form of churn is mentioned ? What is it that 294 QUESTIONS. brings the butter ? — 948. What is the best way of working butter ? What of the sponge and cloth ? What of butter made in this way ? — 949. How might a simple butter-worker be made ? — 950. How is butter prepared for market? Effect of over-salting? — 951. How may new boxes be prepared so as not to taint butter ?— 952. How might both nice butter and cheese be made ? — 953. What is cheese made from ? — 954. From what substances may it be made ? How does the acid act ? — 955. What is the process of making cheese ?--956. What is said of the rennet ? What of the pressing ? — 957. What of the quality of dairy produce? — 958. What is said of bread making?— 959. Of the flour ? — 960. Composition of wheat ? — 961. What is starch ?— 962. What of gluten ? How may it be washed from dough ? — 963. What is bran ?— 964. Effect of water on flour ? What is dough ?— 965. Effect of yeast on dough ? — 966. What makes bread light and spongy ? What takes place when dough is put into the oven ? — 967. What is yeast ? — 968. What changes does it produce ? What checks rising in the oven ? — 969. What change takes place in the bread ? Is stale bread actually drier than new ? Which is the more healthful ? — 970. How does the gluten retain water ? — 971. How does the value of flour depend on the amount of gluten ? — 972. State an experiment with different flour ? — 973. How much water does flour in its natural state contain ? How much bread will a hundred pounds of flour make? — 974. How does the bran compare with flour ? — 975. What of rye flour ? Rye bread ? — 976. Why is wheat flour preferred to rye ?— 977. Of Indian meal ?— 978. The most common modes of cooking meats ? What does beef lose in boiling? Mutton? — 979. What per cent, of water in beef? What in beef corresponds with the gluten of bread ? In what does the differ ence consist? — 980. What is fibrin? How is fat deposited? — 981. To what is the loss in cooking due ? What is the juice of meat ? — 982. How is it preserved ? — 983. How would much of the richness of meats be lost ? — 984. How does the case differ in preparing broths and beef tea ? — 985. On what does the process of soap making depend ? — 986. The difference between soft and hard soaps ? — 987. How is castile soap made ? — 988. What of rosin or yellow soaps ? — 989. On what do the cleansing properties of soap depend ? — 990. Why does water without soap often fail to cleanse ? — 991. How is home to be made attractive ?— 992. What is calculated to secure this end ? INDEX. Page. Acclimation often difficult, 33 Accounts, importance of keeping, 254 Acetous fermentation, 117 Acids, combinations of, 62, 65, G6 Adhesion, force of, 19,20 Agriculture, definition of, • Air, moisture in the, 37, 140 Air, weight of the, 6, 26, 27, 28 Albumen in the body, 71 Alkali, properties of, 63,271,272 Alimentary plants, 55, 56 Alumina, abundance of, 78, 79 Aluminum, basis of clay, 65, 79 Amaryllis family, the, 54 Amendments for special soils, . • 94, 95 Ammonia essential to food of plants, . . .11, 12, 39, 59, 63, 103, 107 Animal heat sustained by combustion, . . . ; . . 13 Animal life, force of, . . • . . V . . . 20 Animal fibrin essential part of muscle, 71, 269 Animals, treatment of, 239, 247 Apples, ripening of, 252 Apple-tree caterpillar, mode of destroying, 223, 224 Apple-tree borer, protecting trees from the, 225, 226 Argillaceous or clay soils, 75, 78, 94 Army worm, ravages of the, 230, 231 Arrow-root, starch in, , 68 Artichoke, culture and qualities of the, 187 Artificial system, ......... . 50 Ashes of plants, 61,104,105,203 Atmosphere, elements of the, 37, 39, 87, 96, 97, 141 Atmosphere, phenomena of the, 31 Attraction of gravitation, 19 Ayrshires, origin and characteristics of the, ...... 232, 233 Barley, soils adapted to, 168, 169 Barometer, use of the, 24, 26, 28 26 296 INDEX. Page. Bases, oxides of metals, 14 Beans, culture and varieties of, . . . . . . . . 179, 174 Bedding for cattle, 119 Beef, loss of, in cooking, 269, 270 Beet, culture and varieties of the, » . . 182, 183 Biennials, . .,'.,. . . 50 Blackberry, cultivation of the, • . . • • •• . . . 252 Blight in plants, . . \ 219, 220 Blood, vitalizing the, 12 Blood, composition of, . 114 Boiling of water, . . ... . . •. . . . 25, 36 Bones, composition of, . . . • . . . . . . . 114 Bran, nutritive qualities of, . .. . 268 Bread making, principles of, .... . •. . . . 264, 265, 268 Breathing, process of, . . . v. . . v . . . . 12,13 Broomcorn, cultivation of, ......... 197, 198 Brush drains, construction of, . . ... . . ... . 139, 140 Buck-wheat family, the, . . . . 54 Buckwheat, culture of, . . ^ . . . .- . . .158,171 Bulbs, planting of, . .'..". 147,151 Burning over lands, . , . . . 132, 135, 137 Butter, making and qualities of, . . . . . . . 260, 261, 262 Butter packing, . ...... . . . . . 262 Butter worker, form of the, . .... .. '. . . . . 261 Cabbage and its culture, .• 52,182,250 Calcareous rocks and soils, 75, 76, 79, 88 Calyx of the flower, . ... . ' . . • . . . 46 Canker-worm, protection against the, . . . . . . . 224 Capillary attraction, . ... . ...... , ' . 17, 42, 133 Capital, necessity for, . . . . . . . . . -1) 245 Carbon and carbonates, . . . * « . 14,60,65,102,103,105 Carbonic acid, combinations and action of, . . 11, 15, 20, 39, 59, 90, 128 Carrots and their culture, 53, 183, 184, 185, 213 Caseine or cheesy matter in milk, . .... . . 71, 255, 256, 262, 263 Cells of the plant, 57 Cellulose or woody fibre, 67, 208, 254 Cellar, bottom of the, . . , 119, 258, 259 Cereals and their culture, , .55, 158, 162, 164, 167, 169 Changes in the atmosphere, . . • 30, 35, 37 Changes of plants in maturing, . , . . . . .166,253,254 Charcoal or carbon, 15, 60 Cheese, process of making, 263, 264 < 'In niir.-il analysis, .....6, 75 Chemistry, what it teaches, 6, 75 INDEX. 297 Page. Chinch-bug destroyed by birds, 230 Chloride of sodium, 64 Chlorine, poisonous qualities of, 64 Chlorophyl, color of plants due to, . • « • . • • . . 71 Churning, process of, ..•••••... 260 Citric acid, taste of oranges due to, ....... 65 Classification of plants, .......... 50 Clay and clay soils, . . ... . 41, 78, 79, 87, 145, 154, 159, 193 Cleanliness, importance of, . . 117, 118 Clearing, process of, „ 135, 137, 141 Climate, influence of, 32, 33 Clouds, definition of, . . 37 Clover and its culture, . .... 52, 87, 188, 189, 192, 193, 211 Coal the remains of vegetation, . 60 Codling-moth, ravages of the, . ' . 224, 225 Cohesion, attraction of, 20 Color of leaves, 71, 72 Color of the soil, effect of, . 89 Colza, cultivation of, 69, 206 Combustible elements, . . . . . Y .... 60 Combustion due to oxygen, .'.. . .. . . . . 7 Composite family of plants, . . . 53 Composts, formation of, . . . ... . 125, 126, 127, 246, 247 Conduction of heat, 18 Copper in the ashes of plants, '."•'.' 65 Copperas a disinfectant, 102 Cotyledonous plants, . . ... • . . . . 48, 49 Crops, protection of, 245, 246 Cruciferous or cress family, the, . 52 Crust of the earth, formation of the, 74 Culinary roots, culture of, 177, 180, 182, 187 Cultivation, benefits of, . 56, 57 Cultivator, use of the, 145, 155 Curculio, ravages of the, 225 Currants and their cultivation, 53, 251 Cut-worm, ravages of the, . 222, 246 Dairy, management of the, \. . . . 255, 263 Decay, how produced, 15, 117 Decomposition, process of, 10, 116, 117 Deep ploughing, effect of, 40, 131, 132, 143 Deepening the soil, 142, 143, 157, 184 Definite proportions, law of, 9 Devon cattle, characteristics of the, . . . . .*. . 233 Dew, formation of, . 31, 32 298 INDEX. Page. Dicotyledonous plants, . 48, 54 Diseases of plants, . 214,215 Digging, process of, . ..,..;. . * • . .130,144 Diluvial soils, . . ...... . . . . . 89, 90 Disinfectants, the most common, 122 Diversity of climate, . ... • »*t. . . • . • 33, 34 Drainage, objects and „ i . . 154,155,165,169,197 Seeds, change of, . . . * . ". . . . . .149,150 Seeds, choice of, . . . . ... 147, 149, 150, 151, 163, 190 Seeds, germination of, ........ 145, 147, 148, 153 Seeds, steeping of, ....... . 153, 161, 182, 184. 218 Seeds, vitality of, 149, 184 Seven fold rotation, ........... 201, 202 Sheep, breeds of, ....... m . . , . 239, 240, 241 Sheep, feeding and management of, . . . . » * .18, 240, 241 Sheep, feeding of turnips to, . 181 Shell lime from the oyster, » *. . . 101 Short-horn cattle, characteristics of, ........ 233 Shrubs, characteristics of, . . ». ». . * . .• ... 55 Sienite, composition of, . . . . . . . . . . 70 Signs of rain, . . , „ • . . 28, 29 Silex in the straw of grains, ......... 62 Silica plants, why so called, . . . . • . * . . 66 Silicious soils and rocks, . . . . ... • . . 75 Simplest plant, power of the, . . . . J* . . . . . 57 Smut in plants, cure for, . 217, 218 Snow, protection afforded by, . .. . . . .. . 38 Soap, manufacture and cleansing properties of, .... 62, 271, 272 Soda found in ashes of sea plants, ........ 63 Soil, absorptive power of the, . . . ... •'.. . 41 Soil, fertility of the, . . . »'.'.. . . 90,91,152 Soil, best quality of, . . . . . ... . . - • . • »^ . 84 Soil, mechanical condition of the, . . . . 134,140, 141, 143, 145, 164 Soil, moisture in the, . , 137, 141, 153 Soil, nitrogen in the, ...» ». • » 144 Soil, temperature of the, .. • 141,144 Soot as a manure, ............ 105 Sowing, early and late, 153, 157, 171, 176 Solving, modes of, 154, 165, 169 Sowing, thin and thick, 152, 156, 166, 172 Spade, use of the, 142 Species, division of genera into, ........ 51 Springs, sources of, • •'!•' Sprout, bursting of the, .......... 48 S'|u:i^li Im^, destruction of, 220 Starch, peculiarities of, .......... 07, us Stable, cleanliness of the, 13, 117, 118 INDEX. Page. Stem of the plant, 45, 49 Stock, object of keeping, 232,233,235,247 Stock, breeds of, 232,233 Stock, loss in slaughtering, • • 238 Stooking of corn, . . . x i. ^ ( * 103, 104 Stones, removal of, . , •"- 136, 145, 248 Stone drains, mode of laying, . • • » . . . . .138,139 Strawberry, culture of the, ..•••«<••• 252 Streams, origin of, ....«.•*«... 39 StriK-ture of the earth, ..«••«.... 74 Stumps, n-inoval of, '.. 135,136 Subsoil ploughing, . . ... « -*• - "* • - .133,143,144 Subsoil, influence of, on vegetation, 92, 93, 143 Substitutes for stable manure, . -• 124,125 Sulphate of potash and soda, . '., .. • '• . . . . 102 Sugar, characteristics of, . 69 Sulphuretted hydrogen, offensive odor of, .'..". . . 12, 113, 127 Sulphur, common, in vegetables, . . . . . . 8, 61, 102 Sulphuric acid in plants, . . . . • ... . . 8, 63, 65, 102 Sun, light of the, . . . . . '."„•'* . . 17,20,22 Super-phosphate of lime, . . '• • * '*"'! . • • 106 Swamps, soil of, . . .-.-.,'«»•> i," . . 86, 88 Swede's, preparation of land for. . • '•"«'.* . . . 180 Swine, food for, . . ... . ... . . 241 Tannin, where found, . . . • • • • - . ... . 72 Temperature of the air, . . , . . . •-•'.•. 24,25,30 Temperature of cream, . . • . . • . . . . 260 Temperature of stables, ........ . . 239 Temperature of the dairy room, 257, 258, 260 Temperature of the soil, 141, 153, 154 Thermometer, construction of the, . « • _• ... . . 24, 25 Thunder storms, cause of, . • • * . . . . . . 38 Tile drains, % .'. •." . . . .138,139 Tillage, effect of, , . . . . .132,133 Tobacco, cultivation of, . . . • •". .. . . 199 Tool-room, importance of a, 245 Trap rock, composition of, 76 Transplanting, advantages of, 156, 157, 253 Trees, organs of, 49 Trees, pruning of, 221, 251, 252 Trees, transplanting of, 156, 157, 253 Trees, trunks of, 49 Tubi-rs. planting of, 147,177,213 Turnip, climate and soil adapted to the, 179, 180 306 INDEX. Page. Turnip, cultivation of the, 180, 181 Turnip, varieties of the, . 180, 181 Underdrains, construction of, 138 Undershrubs, what they are, 55 Unleached ashes, value of as a manure, . ..... . . 104 Vapor in the air, . . . . . . . . . . 6, 7, 36 Varieties, obtaining new, ...'.. 150, 151 Variations in temperature, . . . . . ... . . 30 Vegetable jelly, . . ... . . . . . . 67,68 Vegetable life, ...... 20 Vegetable manures, . . • • 108, 110, 111 Vegetable oils, peculiarity of, ......... 69 Ventilation, necessity of, . * . • . . 12, 13 Vetch sown with oats, . -. ....'. 177 Vinous fermentation, . . . . . . . . . 117 Warm soils, dryness of, . . • . • • • ... . . 89 Water, absorptive power of, 39 Water, effect of on soil, "... 137, 141 Water, removal of, . , . : . ... . . .... . 117, 139, 141 Water, three forms of, . .. . . . : -. • . . . . 35,36 Wastes of the farm, . . .. '.. . . .. . .245,246,248,253 Watering the manure heap, . . . • . . . . . 116, 119 Wax on plants, . . .-....,.. 69 Weather, changes of the, . . . • 24, 28, 29 Weathering, process of, . . , . 81 Weight of the air, ..... . ... . * . . . 8, 26 Weeds, use of as a manure, . .. .. ... . . . . 204 Wet lands, coldness of, . ....... . . .* . . 89 Wheat, composition of, .. ... .. ..'... . . 71,264,267 Wheat, cultivation of, . .. .. .. .. .. .165,166,212,216,253 Wheat, soils for, . -t ; . . . . . . . . . ... 164,216 Wheat sown in drills, . ..,...,... . . .155,165,166 Wheat, varieties of, . . 164, 216 Wheat midge, injury by the, 227 Willows and their culture, 54, 196, 197 Wind, indications of the, 6, 28, 30 Yeast, effect of, 266 Young stock, management ot, 234, 235, 247 RETURN CIRCULATION DEPARTMENT TO— ^ 202 Main Library LOAN PERIOD 1 HOME USE 2 3 4 5 6 ALL BOOKS MAY BE RECALLED AFTER 7 DAYS Renewals and Recharges may be made 4 days prior to the due date. 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