O C O . V VL- 



A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE, 



' ' To the solid ground 

 Of Nature trusts the mind which builds for aye." — Wokusworth. 



No. i646,-VoL. 64]- 



THURSDAY, MAY 16, 1901. 



■id as a Newspaper at the General Pc5t Oflic;.] 



[Price Sixpence. 



[All Rights are Reserved. 



WIRELESS TELEGRAPHY. 



NEW PHYSICAL LABORATORY TABLES. 



THE "APPS-NEWTON" INDUCTION COILS, 



made entirely in the London Workshops of 

 KTE-WTOPJ" SL. CO., 



3 FLEET S^rKEHST, £2.0., 



are now used by all the principal Military, Naval, and 

 Commercial Experts in Wireless Telegraphy, as well as in 

 Radiography. 



THE NEAV 



"LONDON" 



ICROSCOPE. 



With Eye -piece | inch, \ 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, 



REYNOLDS & BRANSON, Ltd., 



Manufacturers of Laboratory Fittings and every description 



of Scientific Apparatus 

 Estimates am.] H. EI EI T> S. [Catalogues Free. 



NEGRETTI & ZAMBRA'S 



IMPROVED 



SELF-RECORDING RAIN- 



CAUCES, BAROMETERS & 



THERMOMETERS, 



Giving continuous Records 



on Charts which only require 



changing weelciy. 



Invaluable to Invalids and 

 y others unable to take daily 

 readings. 



JUustrated Price List of Instruments free by Post to all 

 parts of the World. 



NEGRETTI & Z A IW B R A , 

 38 HOLBORN VIADUCT, E.G. 



Branches: 4? CORNHILL, and .22 REC'.KNT STREET. 

 AWARDED TWO GOLD MEDALS PARIS EXHIBITION 1900. 



