A WEEKLY ILLUbTRATED JOURNAL OF SCIENCE 



" To the solid ground 

 Of Nature trusts the mind which builds for aye" — WORDSWORTH 



No. 489, Vol, 19] 



THURSDAY, MARCH 13, 1879 



[Price Sixpence 



Registered as a Newspaper at the General Post Office.] 



[All Rights are Reserved. 



BEOWNINa'S NEW BINOCULARS. 



THE "EURYSCOPIC" OPERA, £1 as. 



For the Theatre, has the largest field of view, giving delightfully easy vi-ion. 



THE 



" Brings out figures with mar%'elIous distinctness, and has a very large 

 field of Yiew, and so many advantages over the other Binoculars that we 

 have seen, that we confidently award very high praise indeed." 



Popular Science Review. 

 " Exhibits objects with remaricable brightness and sharpness." 



TAe Obieroer. 



PANERGETIC" OPERA, FIELD, AND RACE GLASS, 

 For general use, brilliant light, extensive field of view, and sharp definition. 



NOTICES OF THE PRESS. 



" A wide extension of the field of view is attained, while even in misty 

 weather objects are exhibited with wonderful clearness." 



Naval and Military Gazette. 

 " A very extensive field of view is obtained, and objects in the distance 

 are shown with great distinctness. " 



EH£lish Churchman. 



PRICE £4 los., £5 los,, and £6 los. 



ILLUSTRATED LIST FREE BY POST. 



ACHROMATIC OPERA GLASS, IN CASE, FROM los. 6d. 



JOHN BROWNING, 



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



ROYAL OBSERVATORIES OF GREENWICH AND EDINBURGH, AND THE OBSERVATORIES OF 



KEW, CAMBRIDGE, DURHAM, UTRECHT, MELBOURNE, &c., &c. 



63, STRAND. W.C. 



FACTORY— SOUTHAMPTON STREET, LONDON, W.C. ESTABLISHED 100 YEARS. 



