V 



A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



" To the solid ground 



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



No. 2769, Vol. no] SATURDAY, NOVEMBER 25,-1922 [Price One Shilling 



Registered as a Newspaper at the Ge 



I Post Office.] 



[Ali'Rights Reserved. 



BALANCES & WEIGHTS 



SPECTROMETERS 



Particulars and Prices on application to — 



JOHN J. GRIFFIN & SONS, L™ 



Kemble Street, Kingsway, 

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REYNOLDS & BRANSON, Ltd. 



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BRITISH - MADE Glass, Porcelain, 

 Nickel Ware, and Filter Papers. 



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