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DEC 281916 
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JOnal Muse” 
A WEEKLY’ ILLUSTRATED JOURNAL OF SCIENCE. 
“To the solid ground ~ 
Of Nature trusts the mind which builds for aye. eoWsicewowa, 
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- 
No. 2458, VOL. 98] THURSDAY, DECEMBER 7, 1916 {Price SIXPENCE. _ 
Registered as a Newspaper at the General Post Office.] {All Rights Reserved. 
X-RAY TUBES | , | , BEAKERS, BOATS, 
Of all descriptions Made, 
- Repaired, & Re-exhausted specialise 
on the Premises. aa ge TRIANGLES, 
apparatus to cus- TEST-TUBES, 
_ Coolidge Tubes kept in stock. stands ceacuciighae 
ae te TUBING, 
NEWTON & WRIGHT, Ltd. 2 ORAS Ne Gosia 
on application to 
_ 72 WIGMORE™ STREET, Ww. 
ea Sign (i ll oh si THE SILICA SYNDICATE, Lid., 
@ Agents for Macalaster Wiggin X-Ray Tubes, 
' Undoubtedly the Finest Tubes 82 HATTON GARDEN, “4 
in the World for all purposes, 
f Telephone: Holborn 6380. 
A New _Baroaranh— THE ‘‘ JORDAN.” 
(Regd. Design 62871.) 
DUROGLASS be 
14 CROSS STREET, HATTON GARDEN, E.C. 
Manufacturers of 
Borosilicate Resistance Glassware. 
_Beakers. Flasks, Ete. 
Soft Soda Tubing for Lamp Work. 
General Chemical and 
Scientific Glassware. 
Special Glass Apparatus Made to Order. 
_ DUROGLASS WORKS, WALTHAMSTOW. Gitaahaitiate Ate: 
Shows at a glance the movements of the barometer during 
Descriptive Leaflet post free on application to 
AGENTS: 
BAIRD. & TATLOCK (LONDON) LTD. NEGRETTI & ZAMBRA, 
14 CROSS’ ST., HATTON GARDEN, E.C. 38 HOLBORN VIADUCT, E.C.; 
45 CORNBILL, E.C.; 122 REGENT ST., W. 
