6 05.tf^. 



A WE 



^.EKLY ILLUSTRATED JOIKNAL OF SCIENCE. 



" To the solid ground 

 Of Nature trusts the mind which builds for «_,-,. "-Wordsworth. 



NO. 1666, VOL. 64] THURSDAY, QCT0BER^^_i90i- _ \.^^^^^ Sixv^^c^. 



Registered as a Newspaper at the General Post Office.] 



[All Rights are Reserved. 



ELECTRIC LANTERN. 



R^Y3V03L.r>S SX. BRAJSrSONT, Ltd.. 



C^emictTand Scientific Instrument Makers to the Indian 

 uneniicai anu o Science and Art Department. 



LABORATORY FURNISHERS and MANUFACTURING CHEMISTS. 



NEW PATTERN CHEAP ELECTRIC LANTERN, 

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



New Season's lisi^lanterns and Slides iwst free. 



3V B ^W^^ tToN^ ^ CO., 



OPTICIANS, &c., TO THE KING 

 3 FLEET STREET, LONDON. 



THE NEW 



"LONDON" 



MICROSCOPE. 



With Eye -piece 1 inch, i inch 



Object - glasses, in Mahogany 



Case, 



£5 12s. 6d. 



Double Nose-piece, 9/- extra. 

 Focussing Substage, 14/6 extra. 



R. & J. BECK, Ltd., 



68 CORNHILL, 



above, ha^b« 1 ^y^^^VV^ ^^^ ^^^^^ ^„j "^'"'"^^^^^oo ftl,<stra. 

 14 ^g-^MMER-^^" ^«-^"T^-EiT^ LEEDS. 



SPECTACLES 

 ELECTRIC LIGHT, INCANDESCENT GAS. 



And other Powerful lUuminants 



NEGRETTI & ZAMBRA'S 

 THERMOSCOPIC LENSES 



RENDER %Hb"i.IGHt'"sOFt"aND COOL. 



N. an^l^iPORT.NG SPKCTACLES,^dose.r.tt.„g and havnrg extra 

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 Illustrated PXle ,Tp°{tttMpar,s o/ the W orld. 



NEGRETTI and ZAMBRA, 

 38 HOLBORN VIADUCT, E.G. 



