A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



" To the solid grouna 

 of Nature trusts the mind which builds for aye." — WORDSWORTH 



No. 475, Vol. 19] 



THURSDxW, DECEMBER 5, 1878 



[Price Sixpence 



Registered as a Newspaper at the General Post Office.] 



[.\,11 Rights are Reserved. 



BBOVVNING'S 



MICROSCOPES. 



No. 2A, large size BINOCULAR MICRO- 

 scope with highly finished stand, mechanical 

 stage, with rectangular and circular motions, 

 large mirrors on jointed arm, removable stage 

 fitting for apparatus, four eye-pieces, stand 

 condenser for opaque illumination, i-in. ob- 

 jective of 25' angular aperture, and :|^-in. ob- 

 jective 85° angular aperture, with adjustment 

 for thickness of covering glass, fitted with 

 binocular arrangement, and rack and pinion 

 adjustment to draw tubes. 



PRICE £21 Os. Od. 



PRICE LIST OF MICROSCOPES FREE. 



An Illustrated Catalogue of Mi- 

 croscopes, with 35 Illustrations, 8 

 whole page engravings, post free, 

 7 stamps. 



BROWNING'S new Cheap Series of high- 

 power Objectives, i-in. 80°, ;^2 /J. 6d. \ \-yd.. 

 90", £2 I2s. 6d. ; ^m. 95°, £z S^. od. 



JOHN BROWNING, 



optical and Physical Instrument Maker to H.if. 

 Government, the Royal Society, tlie Royal Obser- 

 vatories of Gramench, Edinburgh, &^c., dr-r. 



63, STRAND, W.C, LONDON. 



Factory — Southampton Street and Exeter Street, London. 



PrIZK MbDAL, 1862. ESTABLISKSO lOO YbAK3. 



Telescopes, Spectroscopes, Opera Gtcuses, &v., &-r. 



