A WEEKLY ILLUSTRATED JOURNAL or PScORKES | 16 
“To the solid ground 
Of Nature trusts the mind which builds for aye. "—WorpsWennfl, 
INDE SS NUMEER. 
No. 2447, VOL. 98] _ 
THURSDAY, SEPTEMBER 21, 
1916 » [PRI 
Registered as a Newspaper at the General Post Office.] 
————— . 
————S=== 
[All Rights Reserved. 
( EE.BECKER & CO,HATTON WALL, 
QW.&0.GEORGE. LTD.,SUCC#=) 
Jom J, GRIFFIN & 
MAKERS OF 
| HIGH-CLASS 
PHYSICAL a 
POCKET D.V. SPECTROSCOPE 
“With plain slit, 26/6; with adjustable slit, 33/- 
RAINBAND SPECTROSCOPE, 54/- 
Kemble Street, KINGSWAY, 
‘Su LONDON, W.C., 
ONS, 
LTD. 
REYNOLDS & BRANSON, Ltd. 
GRAND PRIX AWARD, TURIN. 
SOLE AUTHORISED MAKERS OF 
Stroup & 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, 
condensers 4} in. diam., prism 
with silvered back which can 
be used at “‘C,” or as an 
erecting prism in mount “! D,” 
lime-light _burner, and slide 
carrier. Complete in travelling 
case, without reversible adjust- 
able stage “‘B,” £11 
oF -12 18 
Ditto, ditto, with “Phoenix” arc lamp... 
Reversible adjustable stage “‘B” for supporting apparatus, extra 
The ‘*College” Lantern, without adjustable stage or metal 
holder “ D,” with’ lime-light burner, in travelling Case. ... 
Ditto, ditto, with “‘ Pheenix" arc lamp... 
Adjustable metal holder **D" for erecting prism, “extra. 
Slit and prism for spectrum with support, for either lantern .. 
Polariser and analyser ... ber, 
an 
a 
Ne Bo 
a as 
POPROO 
SOoCoo BRANT 
Catalogues. ost free. 
Optical Lanterns and Accessory Apparatus. 
Chemical and Physical Apparatus and Chemicals. 
Apparatus for teaching Building and Machine Construction 
and Mechanics. 
142 COMMERCIAL STREET, LEEDS. 
A New Barograph—THE “ JORDAN.” 
(Regd. Design 62871.) 
Shows at a glance the movements of the barometer during 
the preceding days. 
Descriptive Leaflet post free on application to 
NEGRETTI & ZAMBRA, 
38 HOLBORN VIADUCT, E.C.; i 
45 CORNBILL, E.C.; 122 REGENT ST., W. 
