BROWNING’S BIN03ULARS. 
OPEN. 
CLOSED. 
THE NEW PORTABLE BINOCULAR. 
This is the most efficient contrivance yet produced for making a Binocular, 
Field, or Opera-glass portable without any sacrifice of efficiency, and it is 
much less liable to injury when made portable than any Binocular of the 
ordinary construction, as in this form the instrument is so hardy that it may be 
sat upon without the least risk of injury. . . . 
Tne object- glasses of this Binocular are ij inches in diameter, and when 
the instrument" is closed it forms a tube 4 inches long and i| inches diameter. 
The mountings of the instrument are all strongly mckehsed, and will not tarnish, 
and the workmanship is of the best kind. 
The Engravings show the instrument both open and closed. 
Price of the Instrument, covered with Russia, complete in case.. £1 12 6 
Sent packed and carriage paid, for is. 6d. extra. 
ILLUSTRATED CATALOGUE SENT FREE. 
JOHN BROWNING, 
Optical Instrument Maker to H.M. Government , the Royal Observatory, 
63, STRAND LONDON, W.C. 
THE CHEMICAL NEWS 
Edited by WILLIAM CROOKES, F.R.S., &c. 
Published Weekly, price 4 d. Annual Subscription , £1, payable in advance. 
This Tournal is devoted to Scientific and Applied Chemistry and also embraces whatever 
, *1 lAcxt* new discoveries in Mineralogy, Metallurgy, Mining, Mechanics, Eledlricity, 
"“A? It also contains an encyclopedic list of 
and the coUateral branchi . . • thc prev ious week, with abstradts of all susceptible 
of advantageous Abridgment, thus making the ‘^o half-yearly volumes, with their copious 
indices, equivalent to an English edition of the Jahresberichte. 
London : Boy Court, Ludgate Hill, E.C. 
