A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



BROVVNING'S BINOCULARS. 



THE NEW THREE-POWER GLASS. 



VERY POWERFUL. 



By turning a stud, the eye-pieces are made changeable 

 at pleasure, so that the glass becomes suitable for either 

 theatre, field, or marine purposes. The arrangement is so 

 strong and simple that it cannot get out of order, nor can 

 the eye-pieces be lost. 



PRICE FROM £4 4s. 



THE DICRATIC, 



OR DOUBLE-POWER BINOCULAR, 



WITH TWO DRAWERS. 



This Binocular Glass haN-ing two drawers, the power is nearly double. 

 This glass is specially adapted for use at sea, or to make out distant 

 signals. It is also better adapted than most Binoculars for looking for 

 shot-marks on targets. It is specially adapted for any purpose for which 

 high magnifj'ing power alone is suitable. 



Price, with 12 Lenses, Object-Glasses 2 in. in diameter, 



£6 10s. 



ACHROMATIC OPERA GLASS IN CASE, from \os. 6d. 

 Complete Illustrated List of Prices free. 



JOHN BROWNING. 



OPTICAL AND ^'"''^^^^^'y^f^^li^^^y^^^O^^^^^^^^T^^ GOVERNMENT, THE ROYAI. 



pr,7fm™,^'..^"'"''AND, W.C., LONDON. 



PRIZE MEDAL, ,862. ' ESTABLISHED 100 YEARS. 



