A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid ground 

 Of Nature trusts the mind which builds for nj^. "—Wordsworth. 



No. 1674, Vol. 65] 



THURSDAY, NOVEMBER 28, 1901. 



[Price Sixpence. 



Newspaper at the General Pcsi UlTice. ] 



ELECTRIC LANTERN 



NEW PATTERN CHEAP ELECTRIC LANTERN, 

 fitted with Hand-feed Arc Lamp in Case, £10 10s. 



Wetv Season's List of Lanterns and Slides post free. 



^ i: XV T O 3V «SC CO., 



OPTICIANS, &c., TO THE KING, 

 3 FLEET STREET, LONDON. 



THE NEV^^ 



LONDON" 



ICROSCOPE. 



With Eye -piece 1 inch, J inch 



Object - glasses, in Mahogany 



Case, 



£5 12s. 6d. 



Double Nose-piece, 9/- extra. 

 Focus.sing Substage, 14/6 extra. 



R. & J. BECK, Ltd., 



68 CORNHILL, 



This Universal Lantern 

 has been devised for the 

 projection of experiments 

 and slides either horizontally 

 or vertically ; it can easily 

 be ' adapted for use as a 

 Lantern Micrnscope. The 



Base-board is made to fold 

 so that the Lantern can [be 

 packed into a box i8i x Si 



^^ Price Complete, £9 0. 



No Science School is com- 

 plete without one. Will be 

 sent on approval if desired. 



REYNOLDS & BRANSON, Ltd., 

 Estimates and] L E: E3 3D S. [Catalogues Free. 



SPECTACLES 

 ELECTRIC LIGHT, INCANDESCENT GAS, 



And other Powerful Illuminants. 



NEGRETTI & ZAMBRA'S 

 THERMOSCOPIC LENSES 



Protect the Eyes from Glare, and 

 RENDER THE LIGHT SOFT AND COOL. 



N. and Z.'s SPORTING.SPECTACLES, close-fitting and having extra 

 large lenses, are the best, for Shooting, Billiards, &c. 



/Uustrated Price Lists of Optical and Meteorological Instruments^ 

 Free by Post to all parts of the World. 



N E G R E TTI AND Z A M B R A, 

 38 HOLBORN VIADUCT, E.G. 



BRANCHES : 46 CORNHILL; 122 REGENT STREET. 

 TWO GOLD MEDALS PARIS EXHIBIT ION 1900. 



