



















A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 
“ To the solid ground 

Of Nature trusts the mind which + a jor aye. “—_ WorpswortH, 


No. 2795, VOL. 111] SATURDAY, May 26, 1923 [PRICE ONE SHILLING 


Registered as a Newspaper at the General Post Office.] 
(All Rights Reserved. 

BALANCES & WEICHTS 



F.E.BECKER & C® 
W.& J.GEORGE (LONDON)'US PROPRIETORS 
17 to 29 HATTON WALL, LONDON.E.C11. 


SPECTROMETERS 

Particulars and Prices on application to— 
JOHN J. GRIFFIN & SONS, LT. 
Kemble Street, Kingsway, 
London, W.C.2. 





REYNOLDS & BRANSON, Lro. 
LABORATORY FURNISHERS AND MANUFACTURING CHEMISTS. 
Balance, Analytical, Rystos 
New Model. Improved _ vertical 
movement of rider hook, rider scale 
running from end to end of beam and 
plumb line. The bearings are agate 
throughout; the beam of hard 
magnalium. Base of black crystal. 
Mahogany case with counterpoised 
front, hinged side doors and sliding 
back and brass levelling screws. To 
carry 200 grammes, sensitive to }th 
milligramme, or jyth milligramme 
with alessload .. .. .. £14 © 0 

Balances renovated and repaired in our own Workshops. 
For Analytical and other Balances and Weights, see special Catalogue. 
Catalogues of Chemical and protien) Ap. paratus mel Chemicals. 
ee 


yy 
! Mus! 
GAUGES 
reading to -02” 
for the accurate 
measurement of 
small pressures. 
Quotations on request. 
NEGRETTI & ZAMBRA sa 
38 HOLBORN VIADUCT, E.C.1. 
LONDON. 
