ee 
A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 
** To the solid grouna 
Of Nature trusts the mind which builds for aye.’’—WoRDSWORTH 
No. 833, VOL. 32] 
DAURS DAYS OGROBER 15, 
1885 [PRICE SIXPENCE 
Registered as a Newspaper at the General Post Office] 
(All Rights are Reserved 
vo MICROSCOPISTS, 
ASTRONOMERS, 
SURGEON: DENTISTS. 
THE SWAN LAMP 
AND FITTINGS may be purchased at 
MAWSON AND SWAN'S STORE, 
31, FARRINGDON STREET, E.C., & MOSLEY STREET 
NEWCAS CLE-ON-TYNE. 
R. & J. BECK’S 
MEW MICROSC OPHE, 
Dy ey arselb Aces 
ae (Sande 
PRICES. 
Stand, with 1-in. Object- 
glass ... 290, ede Abe 
22 0 
Stand, with r-in. and 4-in. 
Object-elasses:..ju tee Om ONO. 
Stand, with Rack and Pinion, 
coarse adjustment, 2 Eye- 
pieces, and 1-in. Object- 
glass ... CoC CDi COC 
 @) (0) 
Full Descriptive Pamphlet sent on 
Application to 
R. &J. BECK, 68, Cornhill, London, E.C. 
GOLD MEDAL 
International Inventions Exhibition, 1885. 
THE NEW 
SELF-REGISTERING ANEROID BAROMETER, 
This instrument has neither a spring nor chain. The motive 
power of the Barometer is obtained from seven vacuum 
chambers, 
It will register automatically with ink on a diagram, by 
means of an eight-day clock motion contained in the drum, 
the fluctuations of the Barometer for a week. An illustrated 
(lescription sent post free. 
PRICE £6 0s. 04. 
JOCHMN BROWNING, 
63, STRAND, LONDON, W.C. 
NEGRETTI AND ZAMBRA, 
SOLE MAKERS OF FJORDAN’S (PATENT) 
SUNSHINE RECORDER. 
PRICE £3 tos. 
With a supply of Charts. 
NEGRETTI 
AND 
ZAMBRA, 
ScienTIFICc INSTRUMENT MAKERS 
TO THE (QUEEN, 
HOLBORN VIADUCT. 
Branches :—45, Cornhill ; 
122, Regent Street, London. 
lllustrated Description Post Free. 
NEGRETTI & ZAMBRA’S 
Large Illustrated Catalogue, 
600 Pages, 
1200 Engravings. 
Price 5s. Ed. 
Silver Medal awarded Inventions’ Exhibition, 1885. 
