A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



" To the solid ground 

 Of Nature trusts the miitd which builds for aye." — Wordsworth 



No. 505, Vol. 20] 



THURSDAY, JULY 3, 1879 



[Price Sixpence 



Registered ai a Newspaper at the General Post Office.] 



[All Rights are Reserved. 



BROW^rNING'S ANEROIDS. 



Mf" 



" The Aneroid is the best Wcather-Glass made:' —Qo\on^\ Sir Hevry James's "Treatise on Meteorological 

 Instruments."/ riW 



After having had satisfactory experience of the performance of the instrument figured above, the late Prof. 

 Phillips named it the " Sovereign " Aneroid. Price £1, or sent packed and carriage paid £1 Is. 6d. 



Illustrated List of Metcorolos^cal Instruments sent free. 



JOHN BROWNING, 



OPTICAL AND PHYSICAL INSTRUMENT MAKER TO H.M. GOVERNMENT, THE ROYAL SOCIETY, 

 THE ROYAL OBSERVATORIES OF GREENWICH, EDINliURGH, &c., &c. 



6 3, STRAND, W.C, LONDON. 



FACTORY— SOUTHAMPTON STREET and EXETER STREET, LONDON. 

 PRIZE MEDAL, 1863. Telescopes, Spectroscopes, Opera Classes, &>€., &'c. ESTABLISHED 100 YEARS. 



