WATSONS' 
“BACTIL'' 
MICROSCOPE 
Constructed to the specification of the British Science Guild for high-power Research Work. 
The latest and best Microscope 
for Laboratory Research Work and 
Photo-Micrography. 
SPECIAL FEATURES 
Body — two inches diameter. 
All movements fitted with sprung fit- 
tings and adjusting screws to com- 
pensate tor wear. 
Fine Adjustment by Vertical Lever. 
Removable Mechanical Stage. 
Compound Substage with screws to 
centre and rackwork to focus. 
Top of limb 
to end of 
Substage 
Carrier, in 
one 
solid casting. 
i Rigidity, 
Accuracy and 
Perfect 
Price in Case : 
£27 10 0 
For full 
particulars of 
the above 
and other 
Microscopes 
for Students 
and all 
classes of 
work 
send for 
Watsons’ 
Catalogue. 
TRY WATSONS’ APOCHROMATIC OBJECTIVES 
They are superb 
W. WATSON & SONS, Ltd. Manufacturers 
313 High Holborn, LONDON, W.C.l. Established 1837. 
