A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



" To the solid ground 

 Of Nature trusts the mitid which builds for oyc."— Wordsworth 



BBOWNING'S BINOCULARS. 



THE NEW PORTABLE .^BINOCULAR. 



This novel contrivance is the most efficient yet produced for making a Binocular, Field, or Opera-glass portable ; 

 it does this without any sacrifice of efficiency, and it is much less liable to injury when made portable than any 

 Binocular of the ordinary construction. To shut the Binocular up the two bodies are simply opened so as to be in a 

 straight line with each other, and then the eye-pieces and screw adjustment close into the tube — in this form the 

 instrument is so hardy that it may be sat upon without the least risk of injury. 



The object-glasses of this Binocular are \\ in. in diameter, and when the instrument is closed it forms a tube 

 4 in. long and i|in. diameter. The whole is inclosed in a flexible French Morocco case, which does not increase 

 its bulk. The mountings of the instrument are all strongly nickelized and will not tarnish, and the workmanship is 

 of the best kind. 



Tlie Engravings show the Instrument both open and closed. 



Price of the Instrument complete, plain black ... ... ... ... ... £115 6 



Do with Nickelized Bars .,. ... ... ... ... ... 1 16 6 



Do do covered with Russia ... ... ... ... ... ... 1 17 6 



Sent packed and carriage paid, for ij. dd. extra. 

 Illustrated Catalot^e sent free. 



JOHN BROWNING. 



OPTICAI, AND PIIYSICAT. INSTRUMENT MAKER TO II.M. GOVERNMENT, THE ROYAL SOCIETY, THE 



ROYAL OBSERVATORIES OF GREENWICH AND EDINBURGH, AND THE OBSERVATORIES OF 



KEW, CAMBRIDGE, DURHAM, UTRECHT, MELBOURNE, &c., &C. 



6 3, STRAND, W.C, LONDON. 



FACTORY— SOUTHAMPTON STREET and EXETER STREET, LONDON. 

 PRIZE MED.AL, 1862. ESTABLISHED 100 YEARS. 



