cclvi 



NA TURE 



r October 26, 1905 



r" ED ARSONVAL MACHINE 



Replaces Coils, Interrupters, and Wimshurst 

 Machines. 



Ppodiicing. perfectly regulating, ^nd exactly measuring 



X-RAYS, HIGH-FREQUENCY CURRENTS, AND 

 STATIC EFFECTS. 



Silent i« W^orl^i«g, Si»«I>le ir^ IVIa«ip»*lat»o«. 



This apparatus has teen already installed by many of the chief "''''^"^.;" ^^.^='"'. ) f'^P^"''''' 

 in France and England, a nd i- giving the very best res ults (v,dc leslnnonials). 



Replaces large iMduction Coils in Laboratory and Research Work requiring 

 2*" High Electric Tensions or Electric Oscillations o f great power and uniformity. 



Descriptive Pamphlet gratis on application f^om^the Sole Agents for Great Britain 



THE MEDICAL SUPPLY ASSOCIATION, 



where the apparatus 



may be seen working 



228 Cray's Inn Road, London. W.C, '-^'"^^ ^"^^ '^''^^ 



RECENTLY 

 REMODELLED. 



Represents K and L 



types, giving: 3-5 H.P. 



and 5 H.P 



respectively. 



Immediate Delivery 



for Stock ■'■izes 



of Engines. 



& G-J%.& 



GREAT REDUCTION 

 CAS CONSUMED. 



Up to the end of 1904, 

 over 51,000 gas and 

 oil engines had been 

 delivered, represent- 

 ing about three- 

 quarters of a million 

 actual horse-power. 



^xr^ + =r^«'«; Ne^wr F>rice X.ist of Electro- 



The new edition is greatly enlarged, containing .08 

 pages fully describing and illustrating all standard a,, 

 many new instruments at reduced prices, with not. 

 assist in the selection of appar--»«-=^- 



COBBEsrONDENCE INVITED. 

 rost free and (fratis mi (iitplicnfioii. 



WATSON 



Established 1837. 



SONS. 313 High Holborn, London, W.C. 



BVafches: 16 FORREST r7aD, EDINBURGH ■ 2 EASY ROW. BIRMINGHAM. 



Established 1837. iirancne=. . .o r........... . 



THE correspondents; CAMERA, 



Originallx^-wvaae for the use ^ .ewspaper Men .n South ATr.ca, 



^ •-. /. T^HIS Camera has been designed for the use of corresponden 



FOR HAND 

 OR TRIPOD. 



over the World. 



EACH SIZE PE 

 PRICE, including ' <■ 

 withou 



a. H. i> 



tv 



lewspaper Men in South Africa, 



THIS Camera has been designed for the use of correspondents 

 ^ artists, and other travellers who, while requiring a Camera 

 pos..essing the greatest stability, cannot spare the space fo-^ ^ ''^S"^^; 

 field camera in addition .0 a hand camera. It is made of the be^t 

 mahogany, carefully finished and covered with hard morocco 

 Lther or pt.Ushed in natural colour or ebonised at the san.e price. 



Vh^u^^:;'^::^T^-<^-^^-H^rS:^ 



USE OP ^^^:^ '^:^^:^T'^:^^o.i^^^ ^o...^-^^: i 



3 Init r 41 by 3S, 5 by 4. ^^ ^^^ q^ 



.i^MEYERr Lta., isTEWMftN ST., OXFORD ST., LONDON. H 



MAKERS OF THE CELEBKATED DALLMEV ER LENSES. 



— ' 'ished by VUcMU.i-^ 



20 l-ioj I 



s, Lr 



London, W.c", and The M 



H.ll. Queen V, 



KSDAV, October : 



"K'^ 



