AMhJH LIBRARY 



SCIENCE- G OSSIF. 



64836 



BECK'S NEW aONDON' MICROSCOPES 



MICROTOMES, 

 GENTRiFUGES. 

 MOUNTING 



MATERIALS. 

 COLLECTING 



APPARATUS. 

 OBJECT 



CABINETS. 

 OBJECTS. 

 STAINS. 



). 



No. 1125J ** 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, Lta., 68 Cornhill, E.G. 



WATSON'S MICROSCOPES, APPARATUS, ^"^ OBJECTS. 



Stand with I Eyepiece .. .. £9 10 



Ditto, completely fitted with 2 Eye- 

 pieces, I in. and }, in. Objectives, 

 Abb6 lUr. and Case .. . £15 



No other Microscope combines so many 

 mechanical conveniences and workman- 

 ship of such perfect character at so low 

 a price. 

 The EuiMJUKtiii Suudent's .Series of 

 MlCKOSCOriiS comprises Inhtrumeiits to suit 

 all purposes. I'rice from £3 3s. 



GO 



^ E-* WD 



S 00 hJ 



^ £2 ^ 



W. WATSON 



Established 1837.] 



WATSON'S 



NEW UNIVERSAL 

 CONDENSER 



FOR MICROSCOPES. 



Total Aperture 1'0 N.A. 



Aplanatic Aperture -95. 



Diameter of Back 

 Lens Y%". 



Mag'iiifylng: Power j%". 



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 e.vccedingly convenient for rapid 

 and accurate work. 



Prices. 

 Opticial part only to fit the ordinary ■ 



Abbe Ilhiininator Carriers ..£276 



Completely ,. mounted with ris 



Diaphragm .. .... .. 376 



Watson's Holosbopic Objectives give exquisite 

 effects. 



ROYAL MICROSCOPE. A medium-priced Instrument, yielding advantages 



obl.iinal.ile u'iili tlif most costly models. 

 " FRAM " MICROSCOPE. A highest 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 IVatson's Catalogue {iVo. 2), 

 i>ostfree on application. 



NEW EDITION 



OK 



Watsoh's Catalogue, 



The most comprehensive 

 in the world. 



Every Microscopist should 

 have one of these. 



of 



Send for the above Catalogue 



(No. 3 Depart ment), 

 post free on application. 



& SONS, Opticiins to H.M. Govt., 313 High Holborn, LONDON, W.G. 



Brancli^^s -IS FORREST RD., EDINBURGH; 78 SWAN8T0N ST., MELBOURNE, AUSTRALIA. 



It contains particulars 



Micro. Specimens 



Illustrating every branch 



of Science, and hundreds of 



subjects of general interest ; 



ALSO OF 



WATSON'S 



Circulating Micro. Slides. 

 240 SPECIMENS 



may be bad on loan for 



£1 Is. 



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



