AMNH LIBRARY 



SCIENCE^ GOSSIP. 



100164835 



BECK'S NEW 'LONDON' MICROSCOPES 



MICROTOMES. 

 CENTRIFUGES* 

 MOUNTING 



MATERIALS. 

 COLLECTING 



APPARATUS. 

 OBJECT 



CABINETS. 

 OBJECTS. 

 STAINS. 



). 



No. H25 J " London" 

 MICROSCOPE, as 

 figured, with two eye- 

 pieces, two object 

 glasses (f-inch and 

 ^-inch), double nose- 

 piece, and packed in 

 mahogany case. 



£6 1 6 



R, &J. BECK, Ltd., 68 Cornhffl, E.C 



WATSON'S MICROSCOPES, APPARATUS, $> OBJECTS. 



WATSON'S 



NEW UNIVERSAL 

 CONDENSER 



FOR MICROSCOPES. 



NEW EDITION 



OF 



Watson's Catalogue, 



The most comprehensive 

 in the world. 



Stand with i Eyepiece .. -. £9 10 



Ditto, completely fitted with 2 Eye- 

 pieces, i in. and J in. Objectives, 

 Abbe Illr. and Case .. ..£15 



No other Microscope combines so many 

 mechanical conveniences and workman- 

 ship of such perfect character at so low 

 a price. 

 The Edinburgh Student's Series of 

 Microscopes comprises Instruments to suit 

 Price from £3 3S. 



Total Aperture 10 N.A. 



Aplanatic Aperture -95. 



Diameter of Back 

 Lens tV'. 



P Magnifying Power . 



Every Microscopist should 

 have one of these. 



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 



Abbe Illuminator Carriers ..£276 



Completely mounted with ris 



Diaphragm 3 7 6 



Watson's Holoscopic Objectives give exquisite 

 effects. 



all purposes, 



ROYAL. MICROSCOPE. A medium-priced Instrument, yielding advantages 



obtainable with the most costly models. 

 "FRAM" MICROSCOPE. A higbest class Instrument at a very moderate cost. 

 VAN HEURCK MICROSCOPE. Replete with every modern convenience. 

 SCHOOL MICROSCOPE. Very efficient-very cheap. 



Full particulars of all the above are contained in Watson's Catalogue (Xo. 2), 

 post free on. application. 



W. WATSON & SONS, Opticians to H.M. Govt., 313 High Holborn, LONDON, W.C. 



Established 1837.] Branches-IB FORREST RD-, EDINBURGH ; 78 SWANSTON ST., MELBOURNE, AU8TRALIA. 



Spottiswoode & Co. Ltd., Printers, New-street Square, London. 



SZ5 E-* CO 



§ o* 3 «-=l 



§ E3 ^ 



*~* zZ S 



«s! <! O 



2 *■* s 



It contains particulars ot 



Micro. Specimens 



Illustrating every branch 



of Science, and hundreds of 



subjects of general interest ; 



■ ALSO OF 



WATSON'S 

 Circulating Mioro. Slides. 

 240 SPECIMENS 



may be had on loan for 



£1 Is. 



Send for Ihc above Catalogue 



(No. 3 Department), 

 post free on application. 



