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W. WATSON & SON'S 

 NEW MICROSCOPE STAND (PATENTED), 



The most perfect Instrument for the employment of light at great 

 angle of obliquity ever introduced. 



W. & S.'s PATENT MECHANICAL STAGE 



la graduated to degrees — Kotates concentric, and will revolve completely round, with any 

 instrument — has mechanical movements in vertical, horizontal, and oblique directions, 

 and is the thinnest and most perfect mechanical stage ever introduced. 



See description in the Royal Microscopical Journal, April and June, 1881. 



IRiistrated Catalogue of above, and all descriptions of Microscopes and Apparatus, 



post free 2d. 



W. WATSON & SONS, 313, High Holbom, London, W.O. 

 TO MI CROSOOr ^ISTs! 



PREPARATIONS OF FBESH "WATER ALGiE, 



Including Desshdie^, Diatomace^, and CEdogonie^ ; also FrxGi, Mosses, &c., showing 



well their Structural Development and Mode of Eeproduction, 15«. per doz. slides. 



A few very good sets of Opaque Lichexs, suitable for low powers with the Binocular. 



These will have especial interest to the Student, showing the true character of the 

 thallus, its colour and mode of growth, and as type specimens from which Herbaria may 

 be named will be invaluable. 



Apply: W. JOSHUA, F.L.S., CIRENCESTER. 



New and Second-tand Microscopes, Objectives, and Accessories. 



A Large Assortment by Eoss, Beck, Coiiiys, Sivtft, and other first-class Makers, on Sale, 

 at a Great Reduction is Peice. 



MICROSCOPICAL OBJECTS in great variety. Sp^cialit^. Phtsiologxcal and Pathological TissTiEa. 



A choice variety nf prepareil Physiological Sections ready for Mounting. 



PHOTOGRAPHIC LENSES, CA5IERAS, and APPARATUS, by Ross, Dallmeteb, and all other esteemed 



Makers. Largest, Cheapest, and Best Stock in London. Kew Catalogues Post Free. 



HUNTER & SANDS, 20, CRANBOURN STREET, LONDON. 



LIVING SPECIMENS FOR THE MICROSCOPE. 



THOMAS BOLTON, S7, Newhall Street, Birmingham. 



SPECIMEN TUBE, ONE SHILLING. 



A Sebies of TwENTT-six TcBES in course of Six Months (or as required) for a Subscmptiok, 



in advance, of £1 Is. 



Portfolio of Drawings, Eig-ht Parts, One ShiUing' each.. 

 Bintt on the Preservation of Living Objects, and their Examination under the Microscope, 3(1. 



UNMOUNTED OBJECTS FOR THE MICROSCOPE. 



PREPARED FOR MOUNTING, WITH INSTRUCTIONS, 



Will be ready immediately — 



Series D* — 24 Australian Zoophj-tcs. Series E*— 12 Palates of Mollosca. 



Series ¥* — 24 Mosses and Hepatics. 



PRICE 2s. EACH SERIES, POST-FREE, 2s. Id. 



Bj^'V^n Cement, the best for Microscopic AVork, post-free. It. 3d. 



Every requisite for Microscopic work. 



E DWARD WARD, 29, BURLINGTON STREET, OXFORD ROAD, MANCHESTER. 



A Large Series of Rock Sections, comprisuig Anamesite, Aplite, Basalt, Diabase, 



Diorite, Dolerite, Elvans, Gabbro, Gneiss, Granite, Graniilite, Lava, 



Liparite, Napoleonite, Neppelirite, Obsidian, Pikrite, Porphjrry, Phonolite, 



Qusirtzite, Rhyolite, Syenite, Tachylite, &c., Is. 6d. and 2s. each. 



Bections of Organic Rocks, showing Foraminifera, Sponge Strncture, Corals, Shells, &c. 



THOMAS D. RUSSELL, 48, Essex Street, Strand, W-C 



