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SCIENCE. 
“ To the solid ground 
Of Nature trusts the mind which builds for aye.” —WORDSWORTH. 
No. 1541, VOL. 60] 
THURSDAY, MAY 11, 1899. 
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[PRICE SIXPENCE. 
Registered as a Nev's SraD: er at the General Post Office. L 
ee Rights are Reserved. 
ae & CO. 8 8 GARDEN SUN- DIALS. 
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NEV TON 
cite hei TO THE QUEEN & GOVERNMENT, 
3 FLEET STREET, LONDON. 
Sek 
THE NO. 1“ VICTOR " HAND CAMERA. 
This Camera 
carries twelve 
} plates in 
sheaths, which ff 
are changed ac- gM 
curately by a 
simple lever 
movement, which 
automati- 
registers |i] 
exposures 
made. 
The lens is an fF 
achromatic ot 
best quality with 
Iris Diaphragm. 
The shutter is 
arranged for time 
and instantane- 
ous exposures, 
and can be regu- 
lated at varying 
speeds. 
JAMES WOOLLEY, SONS & CO., LTD, 
VICTORIA BRIDGE, MANCHESTER. 
Complete Catalogue on application. > 
Price, covered in best quality Morocco, £1 15 0. 
DOUBLE-SURFACE CONDENSER 
(CRIBB’S PATENT). 
Large Condensing Surfaces. 
Small size of Condenser. Small weight, 
Great mee 
EQUAL TO A LIEBIG CONDENSER FIVE 
TIMES ITS SIZE. 
SOLE MAKERS of the Metal Condensers : 
JOHN J. GRIFFIN & SONS, LE 
20-26 SARDINIA STREET, LONDON, W.C. 
IMPROVED 
SELF-RECORDING 
RAIN GAUGE. 
DESCRIPTIVE 
PRICE LIST 
POST FREE. 
INVENTED AND MADE ONLY BY 
NEGRETTI & ZAMBRA, 
Scientific Instrument Makers to Her Majesty the Queen, 
38 HOLBORN VIADUCT, E.C. 
Branches—45 CORNHIL1, E.C., and 122 REGENT STREET W, 
