( 12 ) 



W^. WATSON & SON'S 

 NEW MIOEOSCOPE STAND (PATENTED) 



The most perfect Instrument for the employment of light at great 

 angle of obliquity ever introduced. 



W. & S.'s PATENT MECHANICAL STAGE 



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

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

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



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



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



post free 2d. 



W. WATSON & SONS, 313, Higli Holborn, London, W.C. 



Telescopes, Microscopes, Microscope Object-Slasses, 



AND ALL INSTRUMENTS MADE BY 

 CHARLES STODDER, 131, Devonshire Street, Boston, Mass., U.S.A. 



LONDON AGENT, 



E. WHEEIiER, 48, Tollington Road, HoUoway, N. 



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



A Large Assortment by Ross, Beck, Collins, Swift, and other first-class Makers, on Sale, 



at a Gkeat Eeduciion in Price. 



MICROSCOPICAL OBJECTS in great variety. Sp&ialit^. Phtsiological and Pathological Tissues. 



A choice variety of prepardl Physiological Sections ready for Mounting. 



PHOTOGRAPmC LENSES. CAMERA, and APPARATUS, by Ross, Dallmeter, and all other esteemed 



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



HUNTER & SANDS, 20, CRANBOURN STREET, LONDON. 



LIVING SPECIMENS FOR THE MICROSCOPE. 



THOMAS BOLTON, 87, Nev/hall Street, Birmingham. 

 SPECIMEN TUBE, ONE SHILLING. 



A Series of Twenty-six Tubes in course of Six ]\Ionths (or as required) for a Subscription, 



in advance, of £1 Is. 



Portfolio of Drawing-s, Six Parts. 



Eints on the Preservation of Living Objects, and their Examination under the Microscope, 3d. 



UNMOUNTED OBJECTS FOR THE MICROSCOPE. 



PREPARED, WITH INSTRUCTIONS, POST-FREE 2s. Id, EACH SERIES. 

 The following are again ready for issue — 



U. 12 Gorgon ia Spicules. 

 V. 24 Michigan Botanical. 

 X. 24 American Seeds. 



D. 24 Vegetable Hairs. 



E. 24 Micro Seeds. 

 H. 24 Micro Fungi. 

 J. 24 Zoophytes. 

 Q. 24 Zoophytes. 



Z. 24 Various Botanical. 

 A*. 18 Starches. 



Every requisite for Microscopic work. 

 EDWARD WARD, 29, BURLINGTON STREET, OXFORD ROAD, MANCHESTER. 



MICROS COPIC OB JECTS. 



stained and Injected Preparations from Man and tlie Lower Animals ; 



Insects, parts and entire ; Diatomacese, Foraminifera ; 



Double Stained Sections of Stems, Leaves, Seed Vessels, &c., of Plants; 



Sections of Kocks and Fossils. 



T. r>. PtUSSELL, 4S, Essex St., Strand, TT.C. 



Microscopical Catalogue, Geological Catalogue, and Natural History Circular, Past Free, 2d. 



