O o <9 <j 



A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid ground 

 Of Nature trusts the mind which builds for aye." — WORDSWORTH. 



No. 2761, Vol. i to] SATURDAY, SEPTEMBER 30, 1922 [Price One Shilling 



Registered as a Newspaper at the General Post Office.] 



[All Rights Reserved. 



BALANCES & WEIGHTS 



SPECTROMETERS 



Particulars and Prices on application to— 



JOHN J. GRIFFIN & SONS, L TD 



Kemble Street, Kingsway, 

 London, W.C.2. 



REYNOLDS & BRANSON, Limited. 



"RYSTOS" STILL. 



of: 



Improved Central Flue Water Still and Condenser. 



In this pattern the heat is conducted through the water by mean: 

 central tube, ensuring economy of heating. The condenser worm is 

 pure tin, and the water jacket is air-cooled on two surfaces. One-gall 

 size (1 litre distilled water per hour), solid copper. Ring Burners for sarr 

 Price of various sizes on application. 

 Catalogue of Chemical Apparatus and Chemicals, post free 

 14 COMMERCIAL STREET, LEEDS. 



