A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



" Ta tie solid greund 

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



No. SIS, Vol. 20] THURSDAY, SEPTEMBER 11, i8;9 [Price Sixpence 



Registered as a Newspaper at the General Post Office.] 



[All Rights are Reserved. 



POCKET COMPASSES. 



Fig. I. Fig. 2. Fig. 3. 



£ s. d. 

 Brass Compass with Pendant, Fig. i 036 



New Pocket Compass with Palpable True North Card, Agate Cap and Stop in case. 



Fig. 2 086 



Singer's Pearl Floating Card, which can be seen on the darkest night, in case i\ in. 



diameter, I 8j.; i 5 in., Fig. 3 140 



JOHN BROWNING, 



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



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



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



UNIVERSITIES, HOBOKEN COLLEGE, ic, Ac. 



63, STRAND, W.C. 



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



