AMNH LIBRARY 



SCIENCE- GOSSIP. 



100164834 



BECrS NEW 'LONDON 5 MICROSCOPES 



MICROTOMES. 

 CENTRIFUGES. 

 MOUNTING 



MATERIALS. 

 COLLECTING 



APPARATUS. 

 OBJECT 



CABINETS. 

 OBJECTS. 

 STAINS. 



h 



No. H2S J " London" 

 MICROSCOPE, as 

 figured, with two eye- 

 pieces, two object 

 glasses (f-inch and 

 ^-inch), double nose- 

 piece, and packed in 

 mahogany case. 



1 6 



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



Total Aperture 1-0 N.A. 



Aplanatic Aperture -95. 



Diameter of Back 

 Lens T y. 



Magnifying Power -* s ". 



Tins 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 

 Stand with i Eyepiece .. .. £9 10 for all purposes, the aplanatic aperture is quite 



Ditto, completely fitted with 2 Eye- exceptional, while the large diameter of the back 



pieces, i in. and J in. Objectives, lens renders it exceedingly convenient for rapid 



Abbe Illr. and Case .. £15 and accurate work. 



No other Microscope combines so many Prices. 



mechanical conveniences and workman- Optical part only to fit the ordinary 

 Ship of SUCh perfect Character at SO low *s* Abbe Illuminator Carriers ..£276 



a price. Completely mounted with Iris 



The Edinburgh Student's- Series of Diaphragm .. .. .. 3 7 6 



Microscopes comprises Instruments to suit Watson's Holoscopic Objectives give exquisite 

 all purposes. Price from £3 3s. effects. 



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

 obtainable with the most costly models. 



Every Microscopist should 

 have one of these. 



GO 



g H oc 



It contains particulars of 



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 had on loan for 

 £1 Is. 



CO i— 3 " FRAM " MICROSCOPE. A highest class Instrument at a very moderate cost. 



5"" 



Send for the above Catalogue 



{No. 3 Department), 

 post free on application. 



VAN HEURCK MICROSCOPE. Replete with every modern convenience 

 SCHOOL MICROSCOPE. Very efficient— very cheap. 



Fit tl 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 i8 37 ] Branches-^ FORREST RD., EDINBURCH ; 78 SWAN3T0N ST., MELBOURNE, AUSTRALIA. 



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



