Watson's Microscopes 



For Histology and Bacteriology. 

 BRITISH MADE THROUGHOUT. 



With Kive Years' Guarantee. 



Watson s "H" Edinburgh Students' Microscope 



lAs figured! combines all the Movements which make 

 ACCURATE WORKING A PLEASURE. 



II, hai Mechanical Stage of finest workmanship, and 

 sub-stage with rackwock to focus and screws to contro. 

 In no other Microscope at so low a price aro so many 

 cunveniencas and precision of mechanical parts 

 iiflorded. 



PRICE. £ s. d. 



Stand only, as figured ... ... ... ... 9 12 6 



Stand, completely fitted with "2 Eyepieces, lin. and 



l-6th in. Objectives, Ahhe Illr., and Mahogany Case... 15 



Vt/. WATSON & SONS' 



New 1-6 inch Objective, Parachpomatic Series. 



This lens is produced on a formula of entirely new computation, and is 

 of semi-apochromatic type. No lens of a similar class at present obtain- 

 able is comparable with it for the purposes of the Laboratory and general 

 tv-ork. Its corrections and defining power are superb. In addition to 

 this, it possesses the enormous working distance of one millimetre, 

 thereby enabling specimens witli thick cover-glasses to be examined 

 rwithout risk of damage, and permitting of its use for hanging drop 

 cultures, ])lood counts, ^c, in a manner which no other 1-6 in. will allow. 



Price 30s. 



Watsons' New 1-12 inch Oil Immersien Objective 1*30 f. A. 



Is based on the same system of calculation, and is the finest Oil 

 Immersion Lens for Bacteriological Work at present obtainable. 

 Price £5 

 The above lenses are included with Watsons' Microscopes. 



Watsons' Illustrated Catalogue of Microscopes, No. 1 170 pages) is the most 

 complete list that is published on the subject, and contains lull particulars of the Watson 

 Microscopes, Microtomes, Blood Testing InEtruments, Fhoto-Micrographic Apparatus, and 

 everything ol the latest and best in Microscopy. 



Watsons' Catalogue of Microscopic Objects, No. 3, is a handbook of the 

 richest subjects for Microscopical Sluoy ami inve?tigation. and no Microsccpift should be 

 without it. Every branch cl work is represented 1 y specimens of wonderful perfection. 



Either of the above Catalogues tent post free on application to 



W. WATSON & SONS, 



ESTABLISHED 1837. 



Awarded 42 Cold and other 

 Medals. 



313, HIGH HOLBORN, LONDON, W.C. 



