A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



BROWNTNG'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 i\ 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 tlie workmanship is 

 of the best kind. 



The Engravings show the Instrument both open and closed. 

 Price of the Instrument complete, plain black 

 Do with Nickelized Bars 

 Do do covered with Russia ... 



Sent packed and carriage paid. Illustrated Catalogue sent free. 



£1 15 

 1 16 

 1 17 



JOHN BROWNING, 



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



ROYAL OBSERVATORIES OF GREENWICH AND EDINBURGH, AND THE OBSERVATORIES OF 



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



6 3, STRAND, W.C, LONDON. 



FACTORY— SOUTHAMPTON STREET and EXETER STREET, LONDON. 

 PRIZE MEDAL, 1862. ESTABLISHED 100 YEARS. 



