A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 
‘To the solid ground 
_ Of Nature trusts the mind which builds for aye. ’.__WoRDSWORTH. 
_InNDE=xX NUM B: ER. 
: THURSDAY, OCTOBER 2: 23, 
1913 | PRICE ONE SHILLING» 
{All Rights Reserved. 
BUY DIRECT FROM 
FE.BECKER &C0. HATTON WALL, 
(W.&9.GEORGE. tTD.,SUCC") ? LONDON, E C. 
KINGSWAY, LONDON, W.C. 
Scientific Instrument Makers. 
— ae 
V. Boys's Patent. ) 
For Studying Liquid Films, 
e® 
Marvellous Unique 
Colour- Effects 
combinations of 
of Infinite Wonderful 
Variety. Sy Beauty. 
Price DQB/= _ Peching, wa Caviare 
- Including 2. Bottles of special Soap Solution and Full Instructions. 
JOHN J. GRIFFIN & Suis, ty 
REYNOLDS & BRANSON, Ltd. 
Awards—Grand Prix, Turin. 
Gola Medals, spe Naa London, and Turin. 
eonian Instity, 
fa" 
“S' 4 
NOY 7 1918 
Apparatus to demonstrate the short life of the Emanation from Thorium 
Hydrate, for use with the lantern. Complete with Thorium Hydrate. 
New Descriptive Circular a’ Accessory Apparatus for the 
“S. & R.” lantern, post free. 
14 COMMERCIAL STREET, LEEDS. 
eS 
The syphoning arrangement 
of the “F ERNLEY’ 
Recording Rain Gauge 
is extremely ingenious, 
involving the 
number of working parts. 
minimum 
Write for pamphlet, and price list 
of * Rain Gauges,” sent post free. 
NEGRETTI «¢ ZAMBRA 
38 Holborn Viaduct, London, E.C, 
City Branch: 45 Cornhill, E.C, 
West End: 122 Regent St, W 
