Xe, -T> >) 
APR 22 19) 
A WEEKLY ILLUSTRATED JOURNAL OF SCIENCK. 
“To the solid ground Ne ‘anal Muses ASS 
Of Nature trusts the mind which builds for aye.’-—WorDSWoRTH. a 
In DEX NUM™MBER. 
~ No , VOL. 89] THURSDAY, AP RIL 11; I9i2 _[Price ONE SHILLING 
ia “Registered s asa s a Newspaper a at the General Post “Office. aan" ; (All Rights Recenved: 
‘REYNOLDS & BRANSON, ‘Ltd. 
Awards gained in 1911 for Scientific i enarit 
GOLD MEDAL, ALLAHABAD. GRAND PRIX, TURIN. 
“ RYSTOS ” OPTICAL BENCH 
For use with the Stroud & Rendell Science Lantern. 
ROTATING 
ELECTRIC 
LANTERN. 
The best and 
most convenient 
instrument for 
science teaching. 
Write for fully illus- 
I) trated Catalogue to 
NEWTON & CoO., 
Manufacturers of Optical and Scientific Instruments, 
ee WIGMORE ST., LONDON, W. Descriplive fear of Accessory Apparatus for the 
Telegrams: ** Newtobar, London” Es:ablishd over 200 years, | . & R.” lantern, post free. 
14 éominiiceny. STREET, LEEDS. 
Optical Bench for lantern, one metre long, without fittings, £1 10 O 
| Sliding tables, 4/6 each. Lens holders, 5/6. Adjustable slit, 4/9. 
Screen holder, 4/- Standard candle holder, 1/- Circular table, 1/6. 
Screen with gauze, 3/6, Half-metre extension with foot, 12/6. 
The above can also be used without the lantern as an ordinary optical 
bench, and any part can be supplied separately. 
> Ce > as ¢ EEO Ea (eC 
| N. & Z.’s latest instrument is a 
Jonn J. GRIF F IN « SONS) Wind Direction Recorder 
KINGSWAY, LONDON, W.C. 
MAKERS OF 
Physical Apparatus | 
| GRAND PRIX 
| DIPLOMA OF HONOUR 
AND 
3 GOLD MEDALS 
TURIN INTERNATIONAL EXHIBITION, 19144 
that accurately registers with 
a single pen on a rectilinear 
chart every change in the 
direction of the wind. 
Complete with vane, 20 feet 
of spindle, 400 charts, &c., 
eee 21702 10. = 0 
Descriptive Pamphlet, and List of 
Meteorological Instruments, post free. 
Negretti & Zamb 
Holborn Circus, London, E.C 
45 Cornhill, E.C.; 122 Regent St 
ES © SE $C 
oc Rs ) SE} ae ¢ Ce 
