A WEEKLY ILLUSTRATED JOURNAL- OF 
“To the solid ground 
Of Nature trusts the mind which builds for aye.”—Worpswort 
No. 2446, VOL. 98] 
THURSDAY, SEPTEMBER 14, 1916 
[| PRICE SIXPENCE. 
Registered as a Newspaper at the General Post Office.] 
PRISMATIC COMPASSES 
(War Office Pattern) 
Tested and approved: by Wool- 
wich Arsenal and offered for sale 
under licence from the Ministry 
of Munitions. Made throughout 
in our own Factory. . 
NEWTON & CO. 
Scientific Instrument Makers to H.M. the King, 
72 WIGMORE ST., LONDON, W. 
ESTABLISHED OVER 200 YEARS. 
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. 
DUROCLASS WORKS, WALTHAMSTOW. 
a7 j SOLE SELLING AGENTS: 
BAIRD & TATLOCK (LONDON) LTD. 
14 CROSS ST., HATTON GARDEN, E.C. 
[All Rights Reserved. 
REYNOLDS & BRANSON, Ltd., 
Chemical and Scientific Instrument Makers to ‘His Majesty’s 
Government (Home and Overseas Dominions), Laboratory 
Furnishers and Manufacturing Chemists. 
THE “RYSTOS” BALANCE CASE. 
2' bo’ x 15” * 18” high; glazed ends, tops and fronts, doors to turn up, and 
slide under top, carried on brackets fixed to wall, or cupboards can 
be fitted under same. As specially designed for and supplied to 
The Schools, Shrewsbury. 
CHEMICAL, PHYSICAL, and ‘TECHNICAL LABORATORIES 
Fully Equipped with BENCHES, FUME CHAMBERS, &¢. 
Catalogue of Chemical and Physical Apparatus and Chemicals. 
Designs of Benches and Fittings to suit all requirements. 
(Catalogue post free.) 
14 COMMERCIAL STREET, LEEDS. 
— SE ee a 
A New Barograph—THE “‘ JORDAN.” 
: (Regd. Design 62871.) 
Shows at a glance the movements of the barometer during 
the preceding days. 
Descriptive Leaflet post free on application to 
NEGRETTI & ZAMBRA, 
} ; 38 HOLBORN VIADUCT, E.C.; 
45 CORNBILL, E.C.; 122 REGENT ST., W. 
