Capsurys ABSOLUTELY PURE, therefore BEST. ‘‘The standard of highest Purity.” — The Lancet. gsTABLISHED 1865 aa Vic! New Series. Vol. Vili., Mo. DECEMBER 1901. AN ILLUSTRATED MONTHLY RECORD OF ej SCIENCE COSSIP A Ny EDITED BY JOHN GE: CARRINGTON — PD [ef aS ee | wy LE se AND F. WINSTONE. LONDON: 66 SCIENCE-GossIP ” OFFICE, 110 STRAND, W.C. WHOLESALE AGENTS—HorRACE MARSHALL & SON. BERLIN; R. FrigpLANDER & SOHN, CARLSTRASSE 11. tA Rights Reserved.| PRICE SIXPENCE coattiiee atin —aetanane SCIENCE-GOSSIP. FOR SALE OR EXCHANGE. TEMPERES DIATOMEES DU MONDE ENTIER. Collection of 625 Slides, each described in printed Catalogue. Cost £25. F. W. Mitts, Thornléigh, Huddersfield. MASON’S MICGROSCOPICAL SPECIMENS. SERIES OF 9 DOUBLY STAINED BOTANICAL SECTIONS, 6 INSECT DISSECTIONS or 18 MISCELLANEOUS, 1/1. Practical Hints on Mounting, (Copyright Pamphlet) 6d. New List now ready, 1 stamp. R. G. MASON, 69 Park Rd., CLAPHAM, S.W. LIVING SPECIMENS FOR THE MICROSCOPE. Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actino- sphaerium, Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many other Specimens of Pond Life. Price 1s. per Tube. Post Free. Helix pomatia, Astacus, Amphioxus, Rana, Anodon, &c., for Dissection purposes. THOMAS BOLTON, 25 BALSALL HEATH ROAD, BIRMINGHAM. MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM. THE LABORATORY, PLYMOUTH. The following Animals can always be supplied either living or preserved by the best methods :— Sycon; Clava, Obelia, Sertularia; Actinia, Tealia, Cary: ophyllia, Alcyonium ; ; Hormiphoria (preserved) ; ‘Leptoplana; Lineus, Amphiporus; Nereis Aphrodite; Arenicola, Lanice, Terebella ; Lepas, Balanus, Gammarus, Ligia, Mysis, Nebalia, Carcinus 3 Patella, Buccinum, Eledone, Pecten ; Bugula, Crisia, Perdicellina ; Holothuria, Asterias, Echinus; Ascidia, Salpa (preserved), Scyllium, Raia, etc., etc. For Prices and more detailed Lists apply to The Director, Biological Laboratory, Plymouth. CHARLES A. SNAZELLE, NATURALIST, And Dealer in Microscopie Sundries, Lantern Slides, &e. A Large Number of Botanical and Zoological Micro sabe by j. IORNELE, of Jersey, i in Stock. TO TEACHERS, "STUDENTS, AND OTHERS. Type Collections offerea as below, correctly named and z localised. MOLLUSCA (Land, Freshwater, and Marine). (NOTICE.—WNot confined to British See oe ] zoo Species in 4-drawer Deal Cabinet 25/- 150 “5 6 e 59 es we on 50 40/- 250 ‘5 Io ap = sy : 5 A 70/- (Small Specimens in Glass-topped Poxes.) LEPIDOPTERA Coma e sant BESANT 100 preciiensaa(yl ell selected) .. 20/- 200 oe -. 60/- Cabinets or Book: Pattern S ie Box res exira. COLEOPTERA Caen 1oo Species—(neatly carded) i in Store Box us = 10/6 250 ” ey) a ” » 30/- 500 : ¥ - TO0/- Larger Collections offered at Special Terms. rice Lists on Application. 4 TOLLINGTON PARK, LONDON, N. BUTTERFLIES. MOTHS. Best value given for Collections from all parts of the world. Travellers’ own Collections named, ar- sates and mounted. % Many fine species for sale. PERCY I. LATHY, Sydney Road, Enfield, England SETTING INSECTS. MR. HENRY BARTLETT, 77 Tasman Road, Clapham, London, S.W., Undertakes the setting of Lepidoptera, either fresh Srosinnte or: dried in papers, in Continental or English style. Usual Terms Work promptly executed. Reference to ener of Science-Gosstp. i a wa ease ce meee» om Nig ear Medals and Highest Awards at all ; a Great International Exhibitions. ROSS, Ltp., Manufacturers of Celebrated Photographic Lenses, Field and Studio Cameras, New Hand Cameras, Science & Enlarging Lanterns, Microscopes and Objectives, Sporting & Naval Telescopes, Field, Marine & Opera Glasses, = Sc: PHOTOGRAPHIC ct OUTFITS every purpose. The most useful CAMERAS. FITTED WITH UNEQUALLED ROSS, ZEISS or GOERZ LENSES. Every Requisite for Photography. 2 - - e i e ¥ de, Sa ee Manufacturing Illustrated ROSS, Ltd., Opticians, 2 PRICE LISTS - 11z New Bond Street, London, W., and Post Free. 31 Cockspur Street, Charing Cross. PHYSIOGRAPHY and GEOLOGY. Cor eouNe and MICROSCOPIC SLIDES as advised by Science and Art Directory, arranged by . JAMES R. GREGORY & CO, Mineralogists, &c., to Science and Art Department, British, Indian, and Colonial Museums, &c. Collections made to tllustrate all Works on Mineralogy, Petrology, &c.,. also for Prospectors and Mining Engineers. Minerals supplied for all purposes, either in Specintens or by Weight. STORES AND oe :—1 KELSO PLACE, KENSINGTON, W. lew Catalogues and Lists Free. TO GEOLOGISTS. 1901. SEVENTH YEAR OF DISTRIBUTION. 1901. Typical Collections from famed Barton Beds (Upper Eocene). Series 1, 2,3. Boxed, Named, and Localised. 30 Varieties. Over 1oo Specimens in each Series. .3S. each on receipt of postal orders. Also Suites of PARIS BASIN MOLLUSCA (Eocene, Oligocene, and Miocene). Boxed, Named, and Localised. 40 Varieties, 6s. 6d. ; 100. Varie- ties, 15s.; ; by Parcel Post on receipt of Postal Orders. R. CHARLES, Naturalist, HIGHCLIFFE-ON-SEA, CHRISTCHU&CH, HANTS. ALFRED H. BASTIN, ENTOMOLOGIST, Ivy House, 28 New Road, Reading. All kinds of apparatus for the use of Entomologists kept in stock. A large stock of Exotic Insects of all kinds. A special 40-page Descriptive List may be had fr e on application by intend- 2a ing purchasers. Special cases iilustrating * Warn ng Colours,” ** Mimicry,” ** Protective Resemblance,” &c., can be supplied at very low rates. Correspondence invited. Second-hand cabinets bought and sold. BRITISH SPIDERS. I shall be pleased to help anyone working up local lists _ of British Spiders by naming specimens FREE, Postcay for return of collections should be enclosed. FRANK P. SMITH, _ 15 Cloudesley Place, Islington, London, N. SCIENCE-GOSSIP. 193 A GARDEN POND. By J. LEONARD MONK. HERE are many points wrapt in doubt and mystery connected with the aquatic life of our freshwater tarns and rivers. As instances, we may cite such cases as the necessity of better observation of those small worm-like animals, the Gasterotricha, little understood as yet; the dis- covery of the males of some species of Rotifers; and better knowledge of the aquatic caterpillars of certain moths, ‘‘china marks,” etc. There is un- doubtedly much more to be learnt of the develop- ment and life history of aquatic insects by a careful study of them in their natural surroundings. Even to willing workers, however, in this field of research it is often only on special occasions they are able to pursue their investigations, especially if they should find themselves time-hampered, unfortunate town-workers, as is the case with the writer. To overcome these difficulties, however, I re- This arrangement, both for economy and result, in my estimation, after having given both a fair trial, far surpasses the ordinary glass aquarium. The advantages claimed forit are the following :— A maximum of surface is exposed to the atmo- sphere, ensuring the freshness of the water and a certain amount of natural food-supply for such animals as frogs and newts, which feed on living insects, worms, etc.; also the natural succession of life takes place month by month. A good supply of aquatic weed should be established on a gravel bottom, to prevent stagnation of waste organic matter, as it is well to change the water as rarely as possible, for the retention of microscopic life. I have not changed the water in my aquarium for the last eighteen months, but it still remains perfectly fresh. A small quantity has, however, been added from time to time to supply loss by evaporation CONSTRUCTION OF A GARDEN POND. A. Sloping zinc border. 8B. Outlet cavity. c. Layer of fine cement. D. Layer of rough cement. ©. Layer of bricks, r, Inlet pipe. G. Outlet pipe. H. Stodper. solved to try an experiment which has worked most satisfactorily, bearing good results. It is therefore the object in this article to give a short description of the method used, that others may also share the pleasure and instruction afforded by it. The plan consisted in making a small garden pond, of which the illustration gives a sectional view. I have found the dimensions 4 feet in dia- meter by about 1 foot 6 inches in depth quite large enough for the purpose. An outlet pipe leads into a cavity loosely filled with rubble, to allow the water to drain into the earth. On the other side a feed pipe is fixed, which can be used with the aid of an indiarubber tubing connection, if there is not a convenient water-supply. The bordering zinc should be well tarred and bent over the water at about the angle indicated, which effectually pre- vents the escape of animals with straying pro- pensities. DECEMBER 1901.—No. 91, Vou. VIII. The most suitable and hardy plants I have found to be frogbit, Anacharis, and Potamogeton. Other species may, of course, be substituted according to taste and demands. The stock of animal life to be introduced will depend on the direction in which one’s interests are chiefly engaged. My special hobby has more particularly been the Amphibia, which readily make themselves at home; so completely, in fact, that I have had the satisfaction of seeing many of them undertake family matters. Chief among these important events was the pairing and successful oviposition by some Bombinator pachypus (fire-bellied toads), which for two years previously had been kept in a glass aquarium without pair- ing. A few of this brood are still living, having successfully passed their critical juvenile stages. For the student wishing to follow the develop- ment of the common frog, no better medium could be devised. I was less fortunate with Pelobates Published November 25th, 1901. 194 fuscus (the burrowing toad), as they burrowed out of sight. The larvae of the three British newts, Molge cristata, M. vulgaris,and M. palmata, are all easily reared, and I have now under observation a brood of MW. alpestris (the Alpine newt). I regret I was not successful in obtaining any results from the recently described MW. italica, discovered last year by Count M. Peracca in the South of Italy, a few of which I was fortunate enough to obtain through the kindness of my friend Mr. Boulenger. One method of observing these animals is to suddenly turn a light on at night, when very often some of them can be seen taking a nocturnal stroll round the sides. An important consideration in striking the balance of the pond life is to have a good repre- sentation of mollusca. The species I have found to thrive best are the three common forms: Paludin avivipara, Limnea stagnalis, and L. peregra. The several species of ZVanorbis do not seem to prosper. The freshwater musse] (Anodonta) is handy to keep for dissection, as it is easily kept and will multiply rapidly. On various excursions taken with a Natural History Society I have invariably bottled SCIENCE-GOSSTIP. a little aquatic weed or moss and placed it im the pond on returning home. ‘The result is a fine selection of microscopic life, a list of which would cover most of the common forms. The ova of various beetles and insects develop unexpectedly and furnish hours of serious study. By this means IT have just been following with much interest the development of Cheronomons and the pond skater (Gerris), with the aid of Miall’s work on the ‘Natural History of Aquatic Insects.” With regard to Gerris, by the way, I am able to confirm De Geers’s statement that it captures. and devours living prey, which Miall rather dis- credits, as I have actually seen this animal pounce upon and demolish a small fly that had settled on the water. The above notes have been given merely as examples of the advantage of having material always at hand for any spare hour which may thus be pleasantly and _ profitably spent. I hope on some future occasion to give a more: detailed result of observation and work done in this way. Blenheim Villa, 61 Clova Road, Forest Gate, E. NATURE NOTES IN SOUTH AFRICA. By MaAgor H. A. Cummins, C.M.G., R.AM.C. URING my stay in South Africa I endea- voured to make a few notes on the natural history of the district through which I passed, and other matters of interest. In winter the air is cold and invigorating, and, when travelling over the extensive veldt, hares frequently bound from the long grass, and some- times herds of buck are to be seen. The veldt cat and ant-eater make the ground dangerous to horses, undermining it by burrows. Large holes are to be seen in the ant-hills by which the veldt is usually dotted. They are dug by the ant-eater in its search for food. The undulating country from Bloemfontein to Pretoria is pleasant for travelling. It is inter- sected here and there by rivers, which are crossed by drifts or fords for waggons, not by bridges. IT imagine that if the Boers could have procured rolling stock for railways capable of crossing the drifts like ox waggons they would have done so, as they seem to have an intolerable dislike to bridges. Excepting for the railways, bridges are practically absent for cart traffic. The process of crossing one of these drifts with a heavily laden waggon is by no means easy. ‘The cutting to the river bed is generally a steep gradient, and the brake has to be put on at the right time, otherwise the waggon or team, perhaps both, suffer -con- siderably by over-running of the waggon. Ascend- _ ing the other side is usually very difficult, as in wet weather the path is covered by thick mud, which prevents the draught animals taking a foot- hold, and at the same time clogs the wheels. In dry weather thick dust takes the place of the mud and is nearly as obstructive. If the river is at all flooded a waggon is in danger of upsetting or of being washed away as it bumps from one boulder to another, while several of the oxen may be out of their depth and compelled to swim. Oxen are strange animals to manage: they travel best at night, feeding only during the day. During the forced marches many succumbed to overwork, as they had to travel nearly all day and during part of the night. When an ox becomes sick or weary he lies down and has to be loosed from the yoke and left behind. If he is not very ill he soon regains his feet, and commences to graze. He will then probably be brought on by a later wageon with a deficient team. If not, he dies or is shot. Mules travel until they are quite worn out. They sometimes drop dead in harness. A mule would be getting into delicate health if he could not accumulate suflicient energy to kick a Cape boy when there was opportunity. These SCIENCE-GOSSIP. 195 animals will eat wood, gnawing the disselboom, or pole of a waggon, until it becomes too thin to be of use. Of course, the conditions I have men- tioned were only caused by the most urgent neces- sity. The railway line, bridges, and culverts were often blown to pieces, but still supphes and hos- pitals had to come to the front. As a rule waggons can proceed across country regardless of roads, except here and there where boulders occur, or in cultivated tracts. Once the soil is turned up the surface is very soft, such as in ‘‘mealie patches,” or where Kaffir corn is grown. The whole country appears to be intersected with barbed wire fencing. If this has been put up to keep off lions, it has been most effective. Trees are scarce unless cultivated near farms or in towns, where they grow to a large size. At Wanderboom, near Pretoria, there is an immense fig-tree, resembling the banyan tree of India, except that it does not throw out secondary roots from its branches. This tree, I estimate, covers an area of 5,000 square feet. The common house-flies were a terrible pest at Bloemfontein and The Glen. They swarmed on food and irritated the patients in hospital, unless kept away by mosquito-curtains or fans. ‘To some extent we got rid of them from the tents by driving them out at sunset and closing the tent doors, when they settled outside and were in great part killed by the night frost. Small collections of rubbish will rapidly generate enormous numbers of flies in a hot climate. In Pretoria I tested the time required for the egys of the house-fly and bluebottle-fly to produce the imagines, and I found the period to be under a week. Flies doubtless act as potent carriers of disease. Bred in garbage, they become soiled in their primary environment. In their after-existence, by frequenting contaminated areas, diseased men and lower animals, and subsequently alighting on those in possession of health, they spread infection. To counteract this, and for other reasons, I instituted a method of pouring all discharges from diseased subjects into a boilins solution ; no flies approached the apparatus, as it was free from odour and gave off great heat. The arrangement produced an absolute holocaust of the lower forms of life; in fact, after two minutes, life of all kinds became extinct. This system, I have reason to believe, is now used in hospitals in many parts of South Africa, destroying in that country inestimable numbers of those minute specks of livine matter, which the inscrutable law of the universe has appointed to perform the function of indiscriminate destruction of human and other life.(') Bites from what was locally called the tarantula —a black hairy spider—were not uncommon, and scorpion bites sometimes occurred. I saw two men suffering from small abscesses, each contain- (1) Brit. Med. Journal, April 20th, 1901, p. 954. ing a larva about half an inch long by a quarter of an inch thick. I believed them to be the larvae of the Oestrus livingstonii. The larves on removal were alive, and the abscesses then gave no further trouble. Reference is made to similar larvae in Cobbold’s “Human Parasites,’ an original larva taken from Dr. Livingstone in South Africa was said to be in the Hunterian Museum. By the kindness of one of the curators I was enabled to see this specimen, which I believe was identical in species with those I have described, although a little smaller. But this was probably due to shrinkage caused by the preserving medium. Rats were a great nuisance, occasionally gnaw- ing the hair of persons during sleep. Snakes were few in my experience ; but I found one under the blanket on which a man had been sleeping. The ordinary body lice (Pediculus corporis) were frequent in the clothes of soldiers. It is difficult to say how they originated. Residents in the country maintain that the lice eggs are in the veldt and in waggons. I never observed any of the ordinary head lice (Pediculus capitis); but from wherever the body lice came, they amounted to a perfect scourge. When men were admitted to hospital their clothing was put in store. If infected, as was often the case, as soon as the clothes were cold all the lice in the garments would come to the surface. At this time they could be easily destroyed, but they left their eggs in the innermost folds and creases of the garments so well protected that even boiling was of doubtful utility in destroying them, disintegration of the garments usually preceding that of the eggs. Locusts came in swarms, and if they were as frequent in other parts of the country as they were in the portion through which we marched, they must indeed be.very numerous in South Africa. I had an. idea that they followed our food convoys; but if they looked for spare biscuits at Paardeberg they were disappointed. One comfort, at all events, is, that a method of destroying them by infecting some individuals with a species of Zmpusa fungus has been introduced, by which they are rapidly killed. The living ones consume those dead of the fungus disease, and it is thus spread indefinitely. Ant-hills are very common on the veldt. They form mounds from about two feet to four feet in height, the diameter of the base being some four or five feet. As far as I could see, they are com- posed of earth mixed with some secretion from the ants. In consistence they are extremely hard, but the wheel of a heavily laden waggon cuts through them. I tried to dissect one, and worked with a pickaxe and spade for nearly an hour, but did not get to the foundation, which appears to be deep in the ground. The interior is excavated by tunnels occupied by many old and young ants, with astore of grass stems cut into portions about half an inch long. The young ants are etiolated, while the old H 2 196 SCIENCE. GOSSIP. ones are of a reddish-brown colour, and possess strong mandibles. Ant-hills were very useful to our soldiers as shelters in the battles. The natives grind the hills into powder, and, mixing them with glue made from skins, use them for floors for huts. The material sets hard like cement. Itis also used for making tennis grounds. The Boers frequently whitewashed ant-hills on the veldt to mark the ranges for their guns. The spruits in Pretoria provided a habitat for land crabs. ‘These animals varied in size from a couple of inches to four or five inches across the shell. They dug holes under the footway, causing considerable damage to the earth above, in conse- quence of which the tunnels often collapsed after rain. There is one point which is perhaps worth notice, and that is the method adopted by the Kaffirs for smoking “gunja.” They soften the ground with water, and bury in it a portion of a sjambok lash. The lash is pulled through, leaving a subterranean passage: at one end of this passage the “ gunja” anda live coal are placed, at the other end of the passage the mouth is applied. Having previously filled the mouth with water, the smoke is drawn into the mouth. The water is then ejected and the smoke exhaled as in ordinary smoking of tobacco. The possibilities for scientific investigation in South Africa must not be judged from the fore- going notes. They were made often under great difficulties, and cannot be called more than passing observations, more serious occupation generally commanding one’s attention. Still, they may be of interest to some readers, and form for myself a reminiscence of a very trying period. 29 Nightingale Place, Woolwich. 10th November, 1901. AN INTRODUCTION TO” BRITISH -SPLDERS: By FRANK PERcY SMITH. (Continued from page 174.) GENUS BATHYPHANTES MENGE. ers genus may be distinguished from the six preceding genera by the metatarsi of the first pair of legs being as long as the tibiae. The femora of the first and second pairs are usually each furnished with a spine, but there are no metatarsal spines. The eyes are arranged in a compact group, the distances between those of the posterior row being less than the diameter of the eyes. The posterior row is almost or quite straight, and the anterior centrals are much smaller than the laterals. Bathyphantes variegatus Bl. variegata in ** Spiders of Dorset.”’) Length. Male 2 mm., female larger. The most tangible characteristics are figured. It is a rare spider. (Linyphia Bathyphantes eonecolor Wid. (7Zheridion Jilipes Bi.) Length. Male 2.5 mm., female slightly larger. The vulva and palpal organs, which are figured, are very typical. This species is not rare, and is widely distributed. Bathyphantes approximatus Cb. (Lzzy- phia approximata in ‘‘ Spiders of Dorset.’’) Length. Male 2.7 mm., female slightly larger. Cephalo-thorax dull yellowish-brown, often with some indistinct markings. Palpus of male short. Digital joint with palpal organs very large, almost equalling in length the rest of the palpus. The palpal organs have, in common with those of several allied spiders, a circularly curved spine at their extremity. Apparently rare. Bathyphantes nigrinus Westr. (Linyphia pulla Bl.) Length. Male 3 mm., female 3.5 mm. The palpal organs have a coiled spine at their ex- tremity, but they are considerably smaller than in B. approximatas. The vulva is figured. Not rare. Bathyphantes setiger, F.O.P. Cb. Length. Male 2 mm. This species may be at once recognised by the entire absence of femoral spines. Bathyphantes pullatus Cb. © (Lzuyphia pullata in ‘ Spiders of Dorset.”) Length. Male 2.5 mni. Very closely allied to B. nigrinus, but lacks the coiled spine at the extremity of the palpal organs. Rare. Bathyphantes gracilis Bl. (Lényphia gracilis +L. circumspecta Bl.) Length. Male 2 mm. Abdomen almost white upon its upper surface, with a series of dark transverse markings. The palpal organs are figured. A very common species. Bathyphantes parvulus Westr. (Liyphia parvula in ‘‘ Spiders of Dorset.”’) Length. Male 2.5 mm. Closely allied to B. gracélis, but the abdomen is unicolorous. Not common. SCIENCE-GOSSIP. 197 Bathyphantes dorsalis Wid. (Lenyphia claytoniae Bl.) Length. Male 2.5 mm., female 3 mm. The colouring of this common species is very Sey? Fic. 1. Lepthyphantes minutus Bl. Palpus and vulva highly magnified. variable. The female may be easily distinguished by the form of the epigynum. | zou Org "20 Fr 5 & qs Sar st mete rT £910 0 Stand with 1 Eyepiece 60 Ditto, completely fitted with 2 Eye- pieces, 1 in. and } in. Objectives, Abbé Illr. and Case 5 £15 0 0 No other Microscope combines so many mechanical conveniences and workman- ship of such perfect character at so low a price. Tue EpinpurcH STUDENT'S SERIES OF MIcROSCcOPES comprises posteutents 10 suit _all purposes. Price from £3 3s. ROYAL MICROSCOPE. ATEST ODELS. SCHOOL MICROSCOPE. a= ESTABLISHED 1837.] S CHENEE: GOSSIP. No. -WATSON’S NEW UNIVERSAL CONDENSER FOR Miche see | Total Aperture 1:0 N.A. Aplanatic Aperture *95. Diameter of Back Lens 5°". This Condenser is constructed on the “triple back” principle, which has produced such wonder- ful aplanatism in Watson’s Holoscopic Objectives, &c. The power is the most generally useful one for all purposes, the aplanatic aperture is quite exceptional, while the large diameter of the back lens renders it exceedingly convenient for rapid and accurate work. PRICES. | Optical part only to fit the ordinary Abbé Uluminator Carriers £2 5-0 Completely mounted with Iris Diaphragm .. ES it 6 Watson’s Holoscopic Objectives give exquisite effects. A medium-priced Instrument, yielding advantages. obtainable with the most costly models. ‘EPAM” MICROSCOPE. A highest class Instrument at a very moderate cost. VAN HEURCK MICROSCOPE. Very efficient—very cheap. Full particulars of all the above are contained in Watson's Catalogue (Vo. 2), post free on application. W. WATSON & SONS, Opticians to H.M Govt., Replete with every modern convenience. 1125! MICROSCOPE, as figured, with two eye- pieces, glasses 34-inch), | double nose- piece, and packed in mahogany case. £6 1 4 Magnifying Power +’. | 313 High Holborn, LONDON, W. Branches (6 FORREST RD., EDINBURCH ; 78 SWANSTON ST., MELBOURNE, Ausree SrorriswooprE & Co. Lrp., PRINTERS, New-sTREET Square, Lonpon, ‘¢ London ” two. ‘object 2-inch and 6 NEW EDITION Watson’s Catalogue, The most comprehensive in the world. Every Microscopist should have one of these. __ — es ‘It contains particulars of Micro. Specimens , Illustrating every branch - _of Science, and hundreds of subjects, of general interest ; 3 ALSO OF WATSON’S | Ce Circulating Micro. Slides. 240 SPECIMENS | may be had on loan for ae : £1 18. aaa fe Ca * Send for the above Cataloge (No. 3 Department), post free on application.