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JUN 
A: WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 4 
“To the solid d NStonat | vant 
Of Nature trusts the wind which builds for ayes 2? —Worpswortn. onal Mu USE 
No. 2222, VOL. 89] _THURSDAY; MAY 320, 1912 par =. __[ Price SIXPENCE _ 
“Registered asa Newspaper at ‘the, General Post iced a7 ; t (All Rights | Reserved. 
REYNOLDS & BRANSON, Ltd., 
Manufacturers of Chemical, Physical 
ROTATING and Optical Apparatus. 
The “RYSTOS STEREO” 
ELECTRIC. § prisMATIC 
BINOCULAR 
GLASSES 
The best and 1912 Model 
most convenient will compare favourably in 
instrument for | optical qualities with those of 
science teaching. any other maker. They are 
triangular in shape, thus ensuring 
Waste var fully itlus- a firm grip when in use; dull 
vane black and japanned mounts, with rack adjustment and widely 
separated objectives giving enhanced stereoscopic effect, fitted in 
NEWTON && co., a compact solid leather sling case. 
Manufacturers of Optical and Scientific Instruments, Magnifying 8 diameters ... os . £4 4 0 
72 WIGMORE ST., LONDON, W.@ | Magnifying 10 diameters ... oo . 410 0 
Telegrams: *‘ Newtobar, London” Established over 200 years. 
trated Catalogue to 
14 Commercial Street, Leeds. 
THE "LONDON" (the 
MICROSCOPE. | «raiding Minim’ 
A New Form for Research Work. 
(THE RECENT MODEL.) is a new 
Slow motion four times Prism Binocular. 
finer than usual. 
Swing-out centring and | which combines a magnification of 5-5, a field of view of 
focussing substage. 148 yards at 1000 yards, with the highest degree of 
portability. When not in use, it folds quite flat as shown, 
Iris diaphragm in stage | and measures in its case 6” x 33” 1”. It may be easily 
level with surface. | carried in a pocket, and used whenever a favourable 
opportunity occurs. - Price in case, £7 10 O 
Finder divisions to ar C t 
mechanical stage, &e. Descriptive Pamphlet free on request. 
NEGRETTI & ZAMBRA, 
CANTOR LECTURES Holborn Viaduct, London, E.C. 
By Conrap Beck i cl x is 
on the Bheory of the Branches : 45 Cornhill, E.C, ; 122 Regent St., W. 
Microscope, Price 1/- 
Illustrations 
are 
R. & A | BECK, ETD: 1 full siz { : g ris ) 
68 CORNHILL, E.C. 
