e 
sonia Instiig>~ 
és 
Ay WEEKLY ILLUSTRATED JOURNAL OF SCIENCH. 
OCT 6 1913 
“To the solid ground 
Of Nature trusts the mind which builds for ae. 
’*_WorpDswortTh. 
PA, 
. 2291, \ Miau.-92] - => 
THURSDAY, SEPTEMBER 25, 
Sati al tins: 
1913 [Price 8 Sree . 
Registered as a Newspaper at the (+ Sonera Post Office. } 
i _ {AIL Rights Reserved. 
2 BUY DIRECT FROM 
FE E. BECKER & CO,HATTON WALL, 
(W.& J. GEORGE. LTD.,SUCC#>) LONDON, E iG. 
JOHN J. GRIFFIN & SONS, L” 
KINGSWAY, LONDON, W.C. 
Scientific Instrument Makers. 
e NB sBOW 
(C. V. Boys’s Patent.) e 
a For Studying Liquid Films, ? 
Marvellous Unique 
Colour- Effects 
combinations of 
of Infinite Wonderful 
Variety. Beauty. 
Packi; 
Price 25) = in Unita Kingdon ye 
Including 2 Bottles of special Soap Solution and Full Instructions. 
REYNOLDS & BRANSON, Ltd., 
Optical, Chemical and Scientific Instrument Makers to His Majesty’s 
Government (Indian, Home, and Colonial), 
LABORATORY FURNISHERS & MANUFACTURING CHEMISTS. 
“RYSTOS” DARK-ROOM LAMPS. 
No. 1 Gas Lamp, Fig. 2, with bye- . 
pass tap, for ruby and white light. 
Dimensions, 114 by 7} ins. 12/6. 
No. 2, Ditto. Dimensions, 125 by 
84 ins. 
No. 3. Ditto, with 
vertical front. 
Dimensions, 8) by 
siins. 8/6. 
No. 1. Electric 
Lamp, with semi- 
circular ruby front 
and switch for ruby 
and white light, 
flexible cord and 
Price com- 
5 ai pecs 
AMP, ditto, ditto. 7 
as Fig. 3. Dimen- Fig: 3. 
sions, 114 ins. high, 7} ins. wide. Complete, 21/= post free. 
Catalogue, 104 pages, post free on application. 
14 Commercial Street, Leeds. 
Fig. 2. 
The latest Recording 
Rain Gauge is the 
‘FERNLEY’ 
which embodies 
several new 
interesting. . 
> features. Entirely 
automatic, it is 
seas ek mitoses, 44 
the result — of 
numerous __ tests 
and__ lengthy 
experiments. 
NEGRETTI & ZAMBRA 
38 Holborn Viaduct, London, E.c. Write for 
City Branch: 45 Cornhill, E.C. pamphlet! 
West End : 
122 Regent St. W. 
