A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



" To the solid ground 

 Of Naiure trusts the mind which builds far aye." — WoSDSWORXH 



No. 504, Vol. 20] 



THURSDAY, JUNE 26, 1879 



[Price Sixpence 



Re£t>tered as a Newspaper at the General Post Oflfice.] 



[All Rights are Reservod. 



BEOWNING'S 

 MIOEOSOOPES, 



The MODEL MICROSCOPE, made expressly 

 for class daiionstration, has rack and fine adjust- 

 ments to the body, large stage fitted with universal 

 stage motions, removable stage fittings for appa- 

 ratus, revolving diaphragm, A or B eye-pieces, and 

 I -in. 16° and J-in. 75" objectives of our own 

 manufacture. 



PRICE £5 10s. Od. 



PRICE LIST OF MICROSCOPES FREE. 



Illustrated Catalogue of Microscopes with 

 35 Illustrations, 8 whole page engravings, 

 post free, 7 stamps. 



JOHN BROWNING, 



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

 THE ROYAL OBSERVATORIES OF GREENWICH AND EDINBURGH, &c., &c. 



6 3, STRAND, W.C, LONDON. 



FACTORY— SOUTHAMPTON STREET and EXETER STREET, LONDON. 

 PRIZEIMEDAL, 1862. Telescopes, Spectroscopes, Opera Glasses, St'c.,&'c. ESTABLISHED loo YEARS. 



