xxxvi 



HA RD WICKE'S SCIENCE-GOSSIP. 



NEW ILLUSTRATED 7 CATALOGUE OF MICROSCOPES. 



It contains a full description ot the construction of our 



Microscopes. 



NEW PATTERN MICROSCOPES, including new form of the 



Van Heurck Microscope, New Portable Microscope, Histological Micro- 



NEW'OBJECTIVES. | NEW SUBSTAGE CONDENSER. 

 NEW MICROSCOPE LAMP. 



NEW PHOTO-MICROGRAPHIC APPARATUS for Students, 



the Laboratory, and Van Hcurck s Vertical Camera. 



COMPLETE MICROSCOPICAL OUTFITS, &c, &c. 



The above Catalogue sent post free on application* 



MICROSCOPIC OBJECTS. 



,*> j. a- 



Type Slide of Sponge Spicules. 100 different Species . . . 12 



Type Slide of 12 Spines of Echini, with list of names . . . IS 0* 

 Set of 24 specially-selected Specimens for use with the Micro- 



Polariscope, in case complete 1 7 6< 



Anatomy of Leaf, q pieces, complete on one slide . ♦ . 2 6 



Stinging- Hairs on Leaf of Nettle 10 



Luhg of Chimney Sweeper, showing deposit of Carbon ... 1 J> 



Head and Eyes of Spider ......... 16 



Set of 24 choice selected Diatoinacere. in case complete . . . 1 15 0* 

 Type Slide Diatoraaceae, 100 forms from Richmond, Virginia, with 



list of names 150 



Type Slide Diatomacece, 100 forms from Nottingham, Maryland, 



with list of names 150 



Ovipositor and Lungs of Spider, on one slide 16"- 



W. WATSON & SONS, Opticians to Her Majesty's Government, 



313, HIGH HOLBORN, LONDON, W.C., 

 [Established 1837.] AND 251, SWANSTON STREET, MELBOURNE, AUSTRALIA. 



I iJf X nT\T1TV 2 Gold Medals, Paris Universal Exhibition, 1889. 



A ww A K I JH II 2 Diplomas of Honor for Microscopes and Microscopic Objects, Antwerp International Microscopical 

 il lltlnULilf Exhibition, 1891. And 



— 24 Gold and other Medals at the principal International Exhibitions of the world. 



WORKS BY DR, J. E, TAYLOR, F.L.S., 



Editor of Science-Gossip. 



THE SAGACITY AND MORALITY OF PLANTS: A Sketch of the Life and Conduct 



of the Vegetable Kingdom. With a Coloured Frontispiece and 100 Illustrations. Crown 8vo., cloth extra, 7s. 6d. 



OUR COMMON BRITISH FOSSILS, and Where to Find Them. With 331 Illustrations. 



Crown 8vo., cloth extra, ys. 6d. 



THE PLAYTIME NATURALIST. With 366 Illustrations. Crown 8 vo., cloth extra, 5 s. 



LONDON: CHATTO & WINDU3, 214, PICCADILLY, W. 



HORTUS SICCUS. 



A very complete collection of Dried Hants representing the British Flora, neatly arranged in twenty-one 

 Portfolios ; together with other smaller groups of British Plants, Mosses, and Seaweeds, and a small selection of 

 Botanical Literature from the Library of a distinguished Member of the Linnean Society, recently deceased. For 

 a fuller description of the above, see CHARLES HIGHAM'S Catalogue, No. 234, gratis and post free. 



LONDON: 27a, FARRINGDON STREET, E.C. 



NO BELLADONNA NEEDED. 



OCULIST'S APPARATUS, 



See "Engineering," fitly iB//t, 1890. 

 CURATIVE 



SPECTACLES 



FOR UNEASY SIGHTS. 



The 



MR. A. FOURNET G«SU) 



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(HOURS 11 TILL 7.) 

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Spectacles, Slfel f™™ s - 7/6. 



J~ro>n 



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Homoeopathic 'Review, — "If you 

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(15 Stamps, from the Author.) 



Fournet's Refractometer. 



Shown before Royal Institution. 



PATENT 



SILVER 



BY THE AUTHOR OF "ROBERT FALCONER." 

 Post 8vo., cloth boards, $s. 



medal A TH^EEpOLiD CO^D: 



1889. Poems by Thfee pfiends. 



Edited by GEORGE MACDONALD, LL.D. 



"I am glad to find that Dr. George Macdonald's charming 

 volume, which has hitherto circulated privately, is now published. 

 . . . All lovers of poetry should poshes-; this pretty book, which 

 contains, perhaps, the greatest thing Dr. Macdonald has written. " 



British Weekly. 



"A volume to be desired and possessed. . . . All the poems 

 are worthy of the high reputation which Dr. Macdonald has- 

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 ture.' ' — Ba Jiffs h ire Jo 11 1 tiaL 



"There is a kind of sacred passion throughout, as true in its way 

 as George Herbert's." — Daily Chronicle. 



London: CHATTO & WINDUS, 214, Piccadilly, W. 



TWO MAGAZINES. 



THE IDLER. Edited by Jerome K. Jerome and Robert E. Barr. 



Profusely Illustrated. Sixpence Monthly; or Zs. per year, post free. 



THE GENTLEMAN'S MAGAZINE. One Shilling Monthly, or 



1 4$. per year, post free. In addition to Articles upon Subjects in Literature, Science, and Art, "TABLE TALK" by Sylvanus 

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London: CHATTO & WINDUS, 214, PICCADILLY, W. 



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