8 
Becks Microscopes, 
FIRST CLASS 
OBJECT 
GLASSES. 
MICROTOMES. 
LAMPS. 
OBJECTS. 
CABINETS. 
APPARATUS. 
WITH PERFECT 
FINE ADJUSTMENT, 
EVERY LATEST 
IMPROVEMENT, 
AND EACH 
SUPPLIED 
WITH AN 
IRIS 
DIAPHRAGM. 
FULL 
ILLUSTRATED 
DESCRIPTIVE 
CATALOGUE 
FREE ON 
APPLICATION. 
No. 25. New Form CONTINENTAL MODEL MICROSCOPE. 
R. & J. BECK, 68 Cornhill, London, E.C. 
FACTORY: LISTER WORKS, KENTISH TOWN, 
