CClll 



NA TURE 



[OCTOBFR 28, 1909 



New Supplementary List 



LABORATORY 

 RHEOSTATS 



NOW IN THE PRESS. 



NEW TYPES. 

 INCREASED CAPACITIES. 

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Applications invited for Copies 

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ISILNTHAL6CO. 



{"Department I.), 



85 MORTIMER ST., LONDON,W. 



Contractors to the Adnnralty^ War, 

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DESIGNED AND FITTED AT THE NEW CHEMICAL 

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Estimates 

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Specially 

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The above Combined Standard, fitted also with Electrical 

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Particulars and Catalogue Free on application. 



Muriel Street, Charlotte Street, 

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BROWN & SON. 



AN INEXPENSIVE BALANCE 



(Patent No 



FOR EDUCATIONAL PURPOSES,' 



Designed and Patented by 1 



lAT. J. DOBBS, IVr.A., 



Author of "Examples in Elementary Mechanics," 



" Weighing and Measuring," &c. | 



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TOWNSON & MERCER, 

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THE 'SOHO' 



STEREOSCOPIC REFLEX CAMERA. 



(Enf/ftfih Made TlifougUo\ft, 



Many will appreciate 

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lenses <:^14 lO O 



Write for the i^-page Illustrated Booklet 0/ the 'SOHO' REFLEX. 



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•»• We invite Correspondence on all matters relating to Photography- 



MARIONS CO., Ltd., 



22, 23 Soho Square, 

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I'ruiied by Kichakd Clav & Sons. I.imitkd, at 7 &; 8 Hread Street Hill, Queen Victoria Street, in the City ol London, and published by iMacmillam 

 AND Co., Limited, at St. Martin's Street, London, W.C., and Thk Macmillan Co.mpanv, 66 Fifth Avenue, New Yorlc— Thuksi^av, Oct. 28, 1909. 



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