12. -5. O^ LIBRARY OF THE THEOLOGICAL SEMINARY PRINCETON, N. J. Presented by J:5ro5 5 tou-nc)(ot\C"n Librori ■1 BR A5 .B76 v. 4 Thomson, J. Arthur 1861 1933. The Bible of nature THE BROSS LIBRARY VOLUME IV THE BROSS LECTURES . . 1907 THE BIBLE OE NATUEE FIVE LECTURES DELIVERED BEFORE LAKE FOREST COLLEGE ON THE FOUNDATION OF THE LATE WILLIAM BROSS J. ARTHUR THOMSON, M.A. REGIUS PROFESSOR OF NATURAL HISTORY IN THE UNIVERSITY OP ABERDEEN CHARLES SCRIBNER'S SONS NEW YORK .... 1908 Copyright, 1908, by THE TRUSTEES OF LAKE FOREST UNIVERSITY Published September, 1908 THE BROSS FOUNDATION The Bross Lectures are an outgrowth of a fund established in 1879 by the late William Bross, Lieutenant-Governor of Illinois from 1866 to 1870. Desiring some memorial of his son, Na- thaniel Bross, who died in 1856, Mr. Bross entered into an agreement with the "Trustees of Lake Forest University," whereby there was finally transferred to them the sum of forty thousand dol- lars, the income of which was to accumulate in perpetuity for successive periods of ten years, the accumulations of one decade to be spent in the following decade, for the purpose of stimulating the best books or treatises *'o7i the connection, re- lation and mutvxd hearing of any practical science, the history of our race, or the facts in any depart- ment of knowledge, with and upon the Christian Religion.*' The object of the donor was to "ca// out the best efforts of the highest talent ajid the ripest scholarship of the world to illustrate from science, or from any department of knowledge, and to demon- strate the divine origin and the authority of the Christian Scriptures', and, further, to show how both science and revelation coincide and prove the existence, the 'providence, or any or all of the attri- vi The Bross Foundation hides of the only living and true God, 'infinite, eternal and unchangeable in His being, wisdom, power, holiness, justice, goodness, and truth.*" The gift contemplated in the original agreement of 1879 was finally consummated in 1890. The first decade of the accumulation of interest having closed in 1900, the Trustees of the Bross Fund began at this time to carry out the provisions of the deed of gift. It was determined to give the gen- eral title of "The Bross Library" to the series of books purchased and published with the proceeds of the Bross Fund. In accordance with the ex- press wish of the donor, that the "Evidences of Christianity" of his "very dear friend and teacher, Mark Hopkins, D.D.," be purchased and "ever numbered and known as No. 1 of the series," the Trustees secured the copyright of this work, which is now numbered as Volume I of the Bross Library. The trust agreement prescribed two methods by which the production of books and treatises of the nature contemplated by the donor was to be stimu- lated : 1. The Trustees were empowered to offer one or more prizes during each decade, the competi- tion for which was to be thrown open to "the scientific men, the Christian philosophers and historians of all nations." In accordance with this provision, a prize of $6,000 was offered in The Bross Foundation vii 1902 for the best book fulfilling the conditions of the deed of gift, the competing manuscripts to be presented on or before June 1, 1905. The prize was awarded to the Reverend James Orr, D.D., Professor of Apologetics and Systematic Theology in the United Free Church College, Glasgow, for his treatise on "The Problem of the Old Testament," which was published in 1906 as Volume III of the Bross Library. The next decennial prize will be awarded about 1915, and will be announced in due time. 2. The Trustees were also empowered to "se- lect and designate any particular scientific man or Christian philosopher and the subject on which he shall write," and to "agree with him as to the sum he shall receive for the book or treatise to be writ- ten." Under this provision the Trustees have, from time to time, invited eminent scholars to de- liver courses of lectures before Lake Forest Col- lege, such courses to be subsequently published as volumes in the Bross Library. The first course of lectures, on "Obligatory Morality," was delivered in May, 1903, by the Reverend Francis Landey Patton, D.D., LL.D., President of Princeton Theological Seminary. The copyright of these lectures is now the property of the Trustees of the Bross Fund. The second course of lectures, on "The Bible: Its Origin and Nature," was deliv- ered in May, 1904, by the Reverend Marcus viii The Bross Foundation Dods, D.D., Professor of Exegetical Theology in New College, Edinburgh. These lectures were published in 1905 as Volume II of the Bross Li- brary. The third course of lectures, on "The Bible of Nature," was delivered from September 24 to October 3, 1907, by Mr. J. Arthur Thomson, M.A., Regius Professor of Natural History in the University of Aberdeen. These lectures are em- bodied in the present volume. JOHN SCHOLTE NOLLEN, President of Lake Forest College, Lake Forest, Illinois, November, 1907. SUMMARY OF CONTENTS I. THE WONDER OF THE WORLD The sense of wonder a human characteristic, though very varied in expression — It Hes at the roots of science and philosophy, and is one of the footstools of religion — What are the mainsprings of rational wonder? — The abundance of power in the world — We cannot think of it as beginning or as ending — An illustration from Radium — The power of life is not less wonderful — A water-mite is relatively more efficient than a steam-engine, and a fire-fly than a search-light — The constructive and destruc- tive power of microbes — The abundance of life — Goethe's expression of this — The wonder of the immensities of Nature remains in spite of our modern annihilation of distance — Fraunhofer "approximavit sidera," but there is still room for wonder — The manifoldness of Nature, an overflowing form-fountain — Intricacy of things, an ant is many times more visibly intricate than a locomotive — "The simplest organism we know is far more complex than the Constitution of the United States" — Amid all this multiplicity and intricacy there is a pervading order — The world is a cosmos, not a curiosity-shop; a universe, not a multiverse — Most disturbances of the order are of man's making — "All epidemic diseases could be abolished in fifty years" — The pervading order is seen in the uni- versal network of interrelations — Nature is a vast system of linkages — The web of life — It is true that there is uni- versal flux — The world is "a changeful process in which nought endures save the flow of energy and the rational X Summary of Contents order which pervades it" — Yet there is persistence amid change — A species is "a sort of visible fugue wandering about a central theme" — "The organic world as a whole is a perpetual flux of changing types," and yet there is a remarkable stability of type — The drama of animal life, its inexhaustible marvels — Migrations of birds and eels as illustrations — Adaptations — "Wherever you tap organic nature it seems to flow with purpose" — The old special arguments from design are replaceable by "a wider tele- ology, based upon the fundamental proposition of evolu- tion"— Progress the crowning wonder — In Lotze's words, "There is the unity of an onward advancing melody" — The omnipresence of beauty In finished and normal things — Is any one thing more wonderful than another? — Walt Whitman's doctrine — The wonder of a pebble, a flower in the wall, an earthworm — ^The sense of wonder and the scientific mood — ^The relations of the practical, emotional, and scientific moods — ^The sense of wonder and the re- sults of science — Kant's famous passage on wonder — Emerson's "Excelsior." II. THE HISTORY OF THINGS The antiquity of things — ^The age of the Earth must be reckoned in millions of years — ^Things have changed with the times — The nebular or meteoritic hypothesis — The history of a star — Stages in the history of the Earth — Sculpturing of scenery — The hand of life upon the Earth — Age of the Earth — Inorganic evolution — Interpretation of the past — Scientific interpretation is not in the strict sense explanation — It is redescription in terms of the sim- plest possible formulae — William of Occam's razor — But the common denominator of physical science [Matter, Energy, Ether] is not self-explanatory — Admittedly, science starts with a great deal "given" — Development and evolu- Smmnary of Contents xi tion — The story of the Earth is really the story of a develop- ment, a continuous natural development in which ante- cedents pass over into their consequents — Recoil from the scientific position — The scientific outlook is not the only one permissible and available, but we must not try to look out of two windows at once — The aim of science as dis- tinguished from that of philosophy — If the scientific in- terpretation is sound, the cosmos was already implicit in the "nebula," there never was any chaos at all, there is nothing in the end that was not also in the beginning — We are thus led to add to the scientific interpretation a philosophical interpretation: "In the beginning was the Logos." III. ORGANISMS AND THEIR ORIGIN The great variety of living creatures — What is charac- teristic of them all as distinguished from inanimate systems — Contrast of the quick and the dead — Puzzling phenom- ena, such as latent life, local life, potential life — The living organism looked at from the chemist's point of view — Living matter probably a mixture (obviously no jumble!) of proteids and other highly complex substances, owing its virtue to their cooperative interaction — The living or- ganism looked at from the physicist's point of view — An engine? A self-stoking, self-repairing, self-preservative, self-adjusting, self-increasing, self-reproducing engine I — At present no vital phenomenon can be completely re- described in physico-chemical terms — The living organism looked at from the biologist's point of view — It is char- acterized by its pov/er of growth at the expense of material quite different from itself, by retaining its integrity in spite of ceaseless metabolism, by its cyclical development, by its power of effective response, by its unified behaviour — The problem of the origin of organisms upon the Earth^ xii Summary of Contents Does this admit of scientific solution ? — Had life a begin- ning ? — May organisms have come from elsewhere ? May organisms have been evolved from not-living matter? "Omne vivum e vivo" an empirical statement of the re- sults of observation, not a dogma — The trend of evolu- tionary thinking leads one to favor the idea of abiogenesis — The difficulties to be faced — We must not exaggerate the apartness of the animate from the inanimate; nor depreciate it — Suppose an organism could be made arti- ficially, what then ? IV. THE EVOLUTION OF ORGANISMS The general idea of evolution (that the present is the child of the past and the parent of the future) was first realized in relation to human affairs — It was thence pro- jected on Nature — It is a very old idea, perhaps as old as clear thinking — Darwin and his fellow-workers made the idea of organic evolution current intellectual coin — Why do we accept the evolutionary modal interpretation? — It is not demonstrable like the conservation of energy or like the gravitation formula — We accept it because it fits the facts, because no facts contradict it, because it is con- gruent with our interpretation of other orders of facts — There is no other scientific modal interpretation — The validity of the theory of descent — We must not mix up scientific with transcendental interpretations — The facts of past history as disclosed by the patience of the palaeon- tologists— The record in the rocks — Impressions: that everything is equally perfect, no prentice work; that the fountain of life is practically inexhaustible, infinite resource; that many fine types and races have wholly passed away without leaving any lineal descendants; that there is in- dubitable progress, throughout the ages life has been slowly creeping upward — Factors in Evolution — The raw Summary of Contents xiii material of progress furnished by variations and mutations — De Vries's Evening Primroses — "Modifications" do not count for much as far as the race is concerned — The directive factors are included in the terms Selection and Isolation — A common error as to fortuitousness — The preciousness of individuality — The importance of struggle and endeavor — Struggle is more than competitive — Ethical aspect of organic evolution — Attempt at a correction of the ultra-Darwinian picture — The struggle for existence is often an endeavor after well-being, an rndeavor for others as well as self — Darwin on the emotional value of the evolutionary conception. V. MAN'S PLACE IN NATURE Man's zoological position and his distinctive peculiarities — Closely allied anatomically to the Primates, but dis- tinctive from heel to chin, from big toe to forehead, above all in his big brain — His real distinctiveness depends not on anatomical peculiarities, but on his powers, especially on his powers of rational discourse, of building up general ideas, of guiding his conduct by ideals — Does "the all- pervading similitude of structure" between Man and the Primate stock imply affiliation? — The scientific answer is Yes, Man and the Anthropoid apes must have had a com- mon ancestor — What other interpretations are in the field ? That man is "the Great Exception" to natural evolution, that while his body was naturally evolved he received a specific "spiritual influx" — Summary of the facts used by Darwin and others in support of the evolutionist inter- pretation— As in other cases, these are not demonstrative, but they have a cumulative convincingness — The difficulty of the problem of the Ascent of Man — We do not know how he arose, or whence he came, or when he began, or where it was — His antiquity is certain, but little else — Man xiv Summary of Contents as a "Mutation" — Possible factors in the early evolution of Man — Repugnance to the scientific interpretation, partly due to misunderstanding, partly aesthetic, partly ethical — The value of a product is independent of its re- mote origin — Man is not a masterpiece "accidentally pro- duced"; Man forms a new departure in the gradual un- folding of Nature's predestined scheme — The evolutionist interpretation is not necessarily naturalistic — A comparison and contrast of animal behavior and human conduct — As regards animals, we may speak of intelligence, but not of reason; of words, but not of language; of behavior, but not of conduct — In what sense, if any, can it be said that human conduct has evolved from animal behaviour ? — The cerebral mutation was the Rubicon — Increasing cerebral complexity made a higher intelligence possible, language and conscience date from that dawn — Certain raw ma- terials of conduct in the form of primary impulses were inherited from pre-human ancestry, but Man, who reasoned, spoke, and controlled his behaviour in relation to more than merely perceptual ends, raised these to a higher power — Huxley's thesis as regards the contrast between human and cosmic evolution — Reasons for dissenting from Hux- ley's conclusion — Value of the evolutionary conception of Man — It clears things up, it suggests effort, it is hope- inspiring, it makes the whole cosmic process more intel- ligible— Retrospect on the riddles which our brief survey has disclosed — They bring us back to the wonder with which we began — The riddles of things as they are — We formulate sequences in terms which are not self-explan- atory—The riddles of the history of things— Riddles as to origins— The riddle of the death of the Earth— The riddle of suffering — The philosophical and the scientific outlook — The limitations of science — Anima animans — Meaning of the title "The Bible of Nature." I THE WONDER OF THE WORLD THE WONDER OF THE WORLD The Sense of Wonder. — Perhaps even the most "profane person" has some secret shrine where he allows himself at least to wonder. What may not the object of this wonder be — the grandeur of the star-strewn sky, the mystery of the moun- tains, the sea eternally new, the way of the eagle in the air, the meanest flower that blows, the look in a child's eyes? Somewhere, sometime, some- how, every one confesses, "This is too wonderful for me." The sense of wonder varies in expression ac- cording to race and temperament, according to health and habits, according to its degree of culture and freedom. Caliban's is different from Ariel's, and Prosperous from both. But whatever be its particular expression, the sense of wonder is one of the saving graces of life, and he who is without it might as well be dead. It lies at the roots of both science and philosophy, and it has been in all ages one of the footstools of religion. When it dies one of the lights of life goes out. Keeping to the outer world of nature, let us illustrate what may be called the mainsprings of rational wonder. 3 4 The Bible of Nature Abundance of Power. — In ancient days when mas- tery of the forces of nature was not even dreamed of, men were almost overwhelmed by their sense of the abundance of power in the world. Unable to see much order in this power, unable to utilize it, they took what came and wondered. Often personifying the various forces, they brought thank-offerings when these were benign and sacri- fices when they were hostile. Short-sighted and timorous, they paid heavy premiums to experience, and yet were slow to learn. It may be, however, that they excelled us, in whom familiarity has bred commonplaceness, in their keener sense of the abundance of power in the world. It seems some- times as if we needed an earthquake, a volcanic eruption, a tornado, a comet, to re-awaken us to a sense of the world Bvva/iL