CAMBRIDGE 
UNIVERSAL MICROTOME 
The Illustration is of the 
Cambridge Universal Microtome, 
which will cut perfectly fiat sec- 
tions of any thickness from 2 to 35 
microns in steps of 1 micron. All 
sections are uniform in thickness. 
THE CAMBRIDGE AND PAUL 
INSTRUMENT CO. Ltd. 
Head Office and Showrooms : 
45 Grosvenor Place, London, S.W.l 
Works : 
London and Cambridge. 
52 
Full particulars in List E 182. 
H. K. LEWIS & CO. Ltd., Scientific Booksellers 
Large stock of books in all 
branches of Science, 
Theoretical and Applied. 
Orders by post or telephone 
promptly executed. 
Classified Lists on application. 
136 Gower Street and 24 Gower Place, London, W.C.l 
MICROSCOPES CAMERAS ACCESSORIES 
New and secondhand, latest models, largest selection in London 
Personal inspection invited as stock is constantly changing 
DOLLOND 35 LUDGATE HILL 
10 Old Broad Street, E.C.2 
Govt. Opticians 12 Ge0 rge Street, Croydon 
Estabd. nearly two Centuries ___ 
Dollond’s will BUY for cash or accept in EXCHANGE for other goods 
which will be sent on seven days’ APPROVAL. You may purchase by 
EASY PAYMENTS if desired. Write for our Bargain List— hundreds 
of Instruments to select from. It is worth perusal — is sent gratis — and 
211 OXFORD ST. 
61 Brompton Road, S.W. 
2 Northumberland Avenue 
35 LUDGATE HILL 
10 Old Broad Street, E.C.2 
12 George Street, Croydon 
WILL SAVE YOU FROM 25 TO 50 PER CENT. 
Dollond’s pay high prices for first-grade modern Instruments 
