AMNH LIBRARY 



100164833 



SCIENCE- GOSSIP. 



BECK'S NEW 'LONDON' MICROSCOPES 



MICROTOMES. 

 CENTRIFUGES* 

 MOUNTING 



MATERIALS, 

 COLLECTING 



APPARATUS. 

 OBJECT 



CABINETS. 

 OBJECTS. 

 STAINS. 



^TJLXj catalo 



). 



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 



OILST APPLICATIOIT. 



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



WATSONS MICROSCOPES, APPARATUS, ^ OBJECTS. 



Stand with i Eyepiece 



£9 10 



Ditto, completely fitted with 2 Eye- 

 pieces, i in. and $ 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 



WATSON'S 



NEW UNIVERSAL 

 CONDENSER 



FOR MICROSCOPES. 



Total Aperture 1-0 N.A. 



Aplanatic Aperture -95. 



Diameter of Back 

 Lens T V'. 



NEW EDITION 



OF 



Watson's Catalogue, 



The most comprehensive 

 in the world. 



Every Microscopist should 

 have one of these. 



3 Magnifying Power 



It contains particulars of 



Micro. Specimens 



Illustrating every branch 

 This Condenser is constructed on the triple 

 back" principle, ^ which has produced such wonder- of Science, and hundreds of 

 ful aplanatism in Watson's Holoscopic Objectives, , 



&c. The power is the most generally useful one j subjects, of general interest ; 

 lor all purposes, the aplanatic aperture is quite 



exceptional, while the large diameter of the back ! ALSO OF 



lens renders it exceedingly convenient for rapid i 

 and accurate work. WATSONS 



Prices. 

 Optical part only to fit the ordinary Circulating: Micro. Slides. 



Abbe Illuminator Carriers ..£250 



Completely mounted with Iris 



Diaphragm . . . . . . 3 7 6 



Watson's Holoscopic Objectives give exquisite 

 effects. 



GO 



all purposes. Price from £3 3s 



ROYAL MICROSCOPE. A medium-priced Instrument, yielding advantages 



S=! *1 °^ 



obtainable with the most costly models. 



GO t— 3 " FRAM " MICROSCOPE. A highest class Instrument at a very moderate cost. 

 l>a c^f 55 VAN HEURCK MICROSCOPE. Replete with every modem convenience. 



52 !oJ § SCHOOL MICROSCOPE. Very efficient-very cheap. 



Full particulars of all the above arc contained in Watson's Catalogue {No. 2), 

 post free on application. 



240 SPECIMENS 



may be had on loan for 



£1 Is. 



Send for the above Catalogue 



{No. 3 Department), 

 _J 1 Full particulars of all the above are contained in Watson's Catalogue {.Vo. 2), I , „j.j,lJ,„f,' M , 



^ i-h ?=5 ' post free on application. I P ost f ree on application. 



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



Established 1837] Branches 16 FORREST RD., EDINBURGH ; 78 SWAN ST ON ST., MELBOURNE, AUSTRALIA. 



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



