taJL'"'an/r*'*~ 



A WEEKLY ILLUSTRATED JOURNAL OF SCIEN 



" To the solid ground 

 rture trusts the mind which builds for aye." — Wordsworth. 



No 2$ 56, VOL. 102I THURSDAY, OCTOBER 24, 1918 



[Price Ninepence. 



■ t ( HficC I 



[All Kii 



OPTICAL LANTERNS 



for 



Educational. Welfare. Scientific, and other 



WORK of NATIONAL IMPORTANCE 



NEWTON &, CO., 



Makers of Optical Projection Apparatus of every description 

 72 W1GMORE STREET, LONDON, W. 1. 



REYNOLDS & BRANSON, Ltd., 



Chemical and Scientific Instrument Makers to His Majesty's 

 Government (Home and Overseas Dominions). 



LABORATORY FURNISHERS and MANUFACTURING CHEMISTS. 



WORKS AND OTHER 



LABORATORIES 



equipped 



with Benches, Fume 



Chambers, Apparatus 



and Chemicals. 



Design: 



BRITISH MADE Glass, Porcelain, 



Nickel Ware, and Filter Papers. 



Apparatus in Glass, Metal, or Wood made 



to customers' own Designs. 



(ATA Lot! I ES y(>ST FIIEE. 

 Enquiries for Technical Chemicals in quantity solicited. 



14 COMMERCIAL STREET, LEEDS. 



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 jJpparalus Made lo Order. 



DUROGLASS WORKS, WALTHAMSTOW. 



AGENTS : 



BAIRD & TATLOCK (LONDON) LTD. 



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



ACCURATE 



AND 



RELIABLE 

 THERMOMETERS. 



Send a note of your requirements 



to any of our addresses, and we 



will offer you the best types we 



have in stock. 



NEGRETTI Sc ZAMBRA, 

 38 HOLBORN VIADUCT, E.C. 1 



s leadenhall ST - LONDON. ■"' RE W E ? T ST ' 



!•" Our City Branch ii at 5 Leadenhall Street. E.C. 3 



