A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 
“To the solid ground 
Of Nature trusts the mind which builds for aye.'’—WorpDsworthH. 
No. 2310, VOL. 92] THURSDAY, FEBRUARY 5, 1914° |PRicE SIXPENCE 
Registered as a Newspaper at the General Post Office.) {All Rights Reserved. 
NEWTON & CO.’S 
*“ ACADEMY ” oe eG 1 t Z 
SCIENCE LANTERN 
a cog ns 5 = CATA LO G U ES 
on request. 
Any of which will be sent post free 
on request. 
Microscopes. 
Petrological and Metallurgical Microscopes. 
Dissecting Microscopes, Lens Holders and 
Magnifiers, 
Microscopical Accessories. 
Haematological Appliances. 
Microtomes. 
Photo-micrographic Apparatus. 
Projection Apparatus for Demonstration and 
Drawing. 
Prism Binoculars for Field and Theatre. 
18 BLOOMSBURY SQUARE, W.C. 
(A few doors from the British Museum). 
© rO™mmoOo OMWP> 
Ww. 
iis eo 5 eee eee 
STU D Y e——||| Negretti & Zambra’s 
Recording Rain Gauges. 
rue LENS 
The 
It is the Key to Success in Photography. 
‘FERNLEY’ 
(illustrated) is the 
latest autographic 
self-syphoning rain 
gauge. It is simple 
but ingenious, and 
many new ideas and 
Who can expect to excel who does not understand 
how to use the diaphragm, the swing back, the 
rising front, focussing scale, &c., &c.? All such 
questions are lucidly and simply explained in 
PHOTOGRAPHIC LENSES : Ki en 
A SIMPLE TREATISE.” ; 
350 pages, 44 plates, numerous diagrams and NEGRETTI & ZAMBRA ae 
illustrations, cloth bound. ball ere) 
68 CORNHILL 38 Holborn Viaduct, London, E.C. descnthied of 
R: alo BECK, Ltd: eee rere: City Branch: 45 Cornhill, E.C. the “Fernley,” 
- 
improvements have 
been _ introduced. 
It is efficient, re- 
