tuto 
ii -——— igs ocT17 1918 | 
; A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 
““To the solid ground ational Muse 
' Of Nature trusts the mind which builds for aye.’-—WoRDSWORTH. 
No. 2292, VOL. 92] THURSDAY, OCTOBER: 2, 1913 [Prick SIXPENCE 
~ Registered as a Newspaper at the General Post. Office.) {All Rights Reserved. 
' 
4 
NEWTON & CO.’S 
“ DEMONSTRATOR’S” 
SCIENCE 
LANTERN. iO Best Value 
Illustrated Catalogue ' for Money 
Post Free on request. ever vet 
PTT 
AMAA 
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jee assy 
ca 
Microscopes and Accessories 
offered. Microtomes and Accessories 
Photomicrographic Apparatus 
Projection Apparatus 
Blood Counting Appliances 
Aplanatic Pocket Lénses 
Prism Binoculars ,*3" Titcire 
ETC. 
Sectional Catalogues post free. 
18 BLOOMSBURY SQUARE, W.C. 
(A few doors from the British Museum). 
BECK’S FOCOSTAT LENS 
(HISCOTT’S PATENT). 
Negretti & Zambra’s Latest 
Autographic Rain Gauge, 
The ‘FERNLEY,’ 
provides frictionless action 
without delicate mechanism, 
very open rain and time 
scales, and a chart with 
uniform spacings, 
For particulars, and explanation 
_ This lens fits on to the handle of a Dissecting Instrument, 
of diagram, write for pamphlet to 
Mapping Pen or Needle, and when once set is always in focus 
(focostat). Those who have hitherto used a watchmaker's eye- 
glass or a lens on a stand will appreciate the advantage of this. 
, Being fixed on the instrument itself, itis always in focus, it 
: moves with the instrument. It is ‘invaliuble to fis Botanist, NEGRETTI & ZAMBRA 
Entomologist, Zoologist, and the Draughtsman. ae 38 Holborn Viaduct LondonsEe 
, , B.C. 
. For Botany and Dissecting, complete with Needle .. i atk 
: ” » idee aA Pe Pea », and two special 
4 , ' Scalpels with fine pointed Blades i aoe Eve ire 
»» Draughtsmen, complete with Mapping Pens... ain 6 
6 
-R. & J. BECK, Ltd, 68 CORNHILL, LONDON, E£.C. 
City Branch: 45 Cornhill, E.C. 
West End: 122 Regent St. W. 
