A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



" To the solid ground 

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



No. 477, Vol. 19] 



THURSDAY, DECExMBER 19, 1878 



[Price Sixpence 



Registered as a Newspaper at the General Post Office.] 



[All Rights are Resenred- 



SCIENTIFIC PRESENTS. 



^rj^-'-~::5*Vlfrr» 



Handsome Graphoscope, in Walnut and Maple, with Viewing Lens, 4^ inches in diameter, and Stereoscope 



complete ' £2 5 



Smaller size in Mahogany with 3^ inch Lens £1 7 6 



Browning's Illustrated List of Scientific Instruments adapted for Presents or School Prizes, containing 

 Stereoscopes, Graphoscopes, Microscopes, Opera Glasses, Barometers, Pocket Lenses, Spectroscopes, Telescopes, 

 &c., &c., at prices varying from 5^. to £\o, with many Illustrations, sent Post Free. 



JOHN BROWNING, 



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

 ROYAL OBSERVATORY OF GREENWICH, AND THE OBSERVATORIES OF KEW, CAMBRIDGE, 

 ^MELBOURNE, THE U.S. NAVAL OBSERVATORY, CAMBRIDGE AND HARVARD 

 UNIVERSITIES, HOBOKEN COLLEGE, &c., &c. 



63, STRAND, W.C. 



FACTORY-^SOUTHAMPTON STREET, LONDON, W.C. - ESTABLISHED 100 YEARS. 



