A WEEKLY ILLUSTRATED JOURNAL 



" To the solid ground 



Of Xiiturt: trusts the mind which builds for aye." — Wordsworth. 



INDEX NUMBER 



No. 2552, Vol. 102I 



Registered as a Newspaper at the Genera] Post Office.] 



THURSDAY, SEPTEMBER 26 1918 [Prick One 



~~~^^^~ (All KiRhts 



THE SNOOK X RAY 



Interrupterless Machine 



IS THE BEST APPARATUS 

 FOR RESEARCH WORK 



No Interrupter. 

 No Inverse Current. 

 Completely under control. 

 Conditions can be absolutely 

 reproduced from day to day. 



Sole Makers for the United Kingdom— 



NEWTON 6 WRIGHT, Ltd. 



72 WIGMORE STREET, W. 1. 



DUROGLASS L™ 



14 CROSS STREET, HATTON GARDEN, E.C. 



Manufacturers of 



Borosilicate Resistance Glassware. 



Beakers. Flasks, Etc. 



Soft Soda Tubing for Lamp Work. 



General Chemical and 



Scientific Glassware. 



Special Glass apparatus Made to Order. 



DUROGLASS WORKS, WALTHAMSTOW. 



AGENTS: 



BAIRD & TATLOCK (LONDON) LTD. 

 14 CROSS ST., HATTON GARDEN, E.C. 1. 



REYNOLDS & BRANSON, Ltd. 



Chemical and Physical Apparatus Makers to His Majesty's 



Government (Home and Overseas Dominions), 



Laboratory Outfitters, &c. 



Gold Medals 



Prix and Gold Medal 



APPARATUS for MACKENZIE 

 and FORSTERS THEORETICAL 

 and PRACTICAL MECHANICS and 

 PHYSICS as adopted by H.M. 

 Government and many important 

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 on application. 



Vide : — " Theoretical and 

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 A. Forster, B.Sc. 

 Price • - Post Free 1/9. 



CATALOGUES POST FREE 



Optical Lam< 

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 Nickel W 



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sand Lantern Slides', Chen 

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ind Filter Paper 



,d Physical Apparatus and 

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ANEMOMETRY. 



NEGRETTI & ZAMBRA, 



38 HOLBORN VIADUCT. E.C 



LONDON. 



COKNHILL 

 E.C. 3 



