A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



" To the solid grouna 



BROVVNING'S MICROSCOPES. 



THE COMPLETE BINOCULAR. 



This instrument has a firm, well-finished stand, with rack 

 and fine adjustment to body, mechanical motions to stage, 

 removable fittings for apparatus, revolving diaphragm with 

 three apertures, A or B eye-pieces, and i in. i6^ and 5^ in. 

 75" objectives ; fitted with binocular arrangement, with 

 lever adjustment for adapting the eye-pieces to the width 

 of the eves of the obser\-er. 



PRICE £10 lOs. Od. 



Price List of Microscopes Free. 



An Illustrated Catalogue of Microscopes, 

 with 35 Illustrations, 8 whole page engravings, 

 post free, 7 stamps. 



BROWNING'S new Cheap Series of high-power Objec- 

 tives, i-in. 80°, £2 7s. 6d.; \-va.. 90", £z 12s. 6cl. ; ^in. 95", 

 £l> Ss. od. 



JOHN BROWNING, 



OPTICAL AND PHYSICAL INSTRUMENT MAKER TO 

 H.M. GOVERNMENT, THE ROYAL SOCIETY, THE 

 ROYAL OBSERVATORIES OF GREENWICH, EDIN- 

 BURGH, &c., &c. 



63, STEAND, W.C, LONDON. 



Factor)- — Southampton Street and Exeter Street, London. 



Prize Medal, 1862. Established 100 Years. 



Telescopes, Spectroscopes, Opera Glasses, &*c., &'c. 



