

A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE: 



" To the solid ground 

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



No j 5 50. Vol. 102I THURSDAY, SEPTEMBER 12 1918 



I Price Sixpence. 



Newspaper ;it the General Posl 



[All ki 



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 <3 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 Cbemical and 



Scientific Glassware. 



Special Glass Jlpparatus Made to Order. 



DUROGLASS WORKS, WALTHAMSTOW. 



AGENTS : 



BAIRD & TATLOCK (LONDON) LTD. 

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



CHEMICALS 



Analytical, Technical and Research. 



REC V™ APPARA TUS 



\J/ \Jr — — 



Balances 



■MSf BENCHES 



Fume Chambers, etc., 

 for 



a snow crystal Chemical Laboratories 

 Price Lists and Estimates on Application. 



REYNOLDS & BRANSON, LTD., 



Contractors to the War Office, Admiralty, and 

 Egyptian Government, &c, 



14 COMMERCIAL STREET, LEEDS. 



ANEMOMETRY. 



NEGRETTI &, ZAMBRA, 

 38 HOLBORN VIADUCT, E.C. 



4S CORNHILL 

 E.C. 3 



LONDON. 



