A WEEKLY ILLUSTRATED JOURNAL -OF SCIENCE. 
“To the solid ground 
Of Nature trusts the mind which builds for aye.’ 
*—Worpsworth. 
No. 2216, VoL. 89] 
THURSDAY, 
Registered asa 1 Newspaper Ge General Post Office. ee 
(oat Gee 
THE “STONYHURST” 
SIMPLEX SUNSHINE RECORDER 
Records the intensity and 
duration of sunshine for 24 
hours on a prepared photo- 
graphic chart which merely 
requires washing in cold water 
to become permanent. This 
instrument, which is well made 
and thoroughly efficient, has 
been designed to enable accu- 
rate records to be obtained by 
those who do not wish to go 
to unnecessary expense. The 
_ “*Stonyhurst” Simplex Sun- 
shine Recorder, with divided 
arc to suit any latitude, with 
roo charts and directions for 
use, complete ... ... 35/=- 
Sole Makers: 
NEWTON & CO., 72 Wigmore St., London, W. 
Established over 200 years. Telegrams: 
Write for Illustrated Catalogu 
General Scientific 
‘“ NewTosar, Lonpon.” 
of Optical, Meteorological, and 
Apparatus. Post free on request. 
THE “LONDON” 
MICROSCOPE. 
A New Form for Research Work. 
(THE REGENT MODEL.) 
Slow motion four 
finer than usual. 
Swing-out centring 
focussing substage. 
Iris diaphragm in stage 
level with surface. 
times 
and 
Finder divisions to 
mechanical stage, &c. 
CANTOR LECTURES 
By Conrap Breck 
on the Theory of the 
Microscope, Price I/= 
R. & J. BECK, LTD., 
68 CORNHILL, E.C. 
cee ee 
APRI Hs 
1912 
" [Price SIXPENCE 
[an Rights I Reserved. 
REYNOLDS & BRANSON, Ltd. 
GRAND PRIX AWARD, TURIN, 1911. 
SOLE AUTHORISED MAKERS OF 
STROUD & RENDELL SCIENCE LANTERNS. 
The ‘* University” Lan- 
tern, with Russian iron 
body, sliding baseboard, two 
superior objectives, | plane 
silvered mirror “A,” which 
is moved by a knob causing 
the rays to be reflected 
upwards for the projection 
of objects in a_ horizontal 
plane, condenser 4} in. diam., 
prism with silvered back 
which can be used at “C,” 
or as an erecting prism 
in .nount “D,” lime-light 
burner, slide carrier. Price 
complete in travelling case, 
without nererele adjustable 
table “B, £9 10 0 
Ditto, ditto, with “ Phoenix” arc lamp con at A076 
Reversible adjustable table ‘‘B” for supporting apparatus, extra 7 6 
The ‘‘ College” Lantern, without Ue Ee with 
lime-light burner complete A Fe 712 6 
Ditto, ditto, with ‘‘ Phoenix” arc lamp = SynOn 0) 
Slit and prism for spectrum with support, ‘for either lantern . eee! erie 
Polariser and analyser ... Zn) 0; 
Catalogues. post free. 
Optical J. anterns and Accessory Apparatus, 223 pages. 
New Abridgee ist of Chemical Apparatus and Chemicals, 44 pages. 
Mechanic dels for teaching Building and Machine Construction. 
1a Cc AMERCIAL STREET, LEEDS. 
The 
Anemo-Biagraph 
records the Velocity of the wind. 
Price £20 0 0 
Wind Direction Recorder 
registers the Direction of the wind. 
Price £17 10 0 
And the Combined Apparatus re- 
cords the Velocity and Direction 
simultaneously upon one chart. 
Price £35 0 0 
Pamphlets describing above, 
and list of Meteorological 
Instruments free on request. 
Negretti & Zambra, 
Holborn Circus, London, 
IDs OF 
Branches: 
45 Cornhill, E.C.; 122 Regent St., W. 
