THE 



AMERICAN JOURNAL OF SCIENCE 



[THIRD SERIES.] 



Art. LII. — Electro-Chemical Effects due to Magnetization; 

 by G-eorge Owen Squier, Ph.D., Lieut. U. S. Army. 



Introduction. 



The influence of magnetism on chemical action was the 

 subject of experiment by numerous investigators during the 

 first half of the present century.* Up to 1847, we find, by 

 no means, a uniformity of statement in regard to this subject, 

 and secondary effects were often interpreted as a true chemical 

 influence. Among the earlier writers who maintained that 

 such an influence exists, may be mentioned Ritter, Schweigger, 

 Dobreiner, Fresnel, and Ampere, while those of opposite view 

 were Wartmann, Otto-Linne Erdmann, Berzelius, Robert Hunt 

 and the Chevalier JSTobili. 



Professor Remsen's discovery in 1881, of the remarkable 

 influence of magnetism on the deposition of copper from one 

 of its solutions on an iron plate, again attracted attention to 

 the subject, and since then considerable work has been done 

 directly or indirectly bearing on the question. 



Among other experiments by Professor Remsenf were the 

 action in the magnetic field of copper on zinc, silver on zinc, 

 copper on tin, and silver on iron, in all of which cases the 

 magnet evidently exerted some influence. With copper sul- 

 phate on an iron plate the effects were best exhibited, the 

 copper being deposited in lines approximating to the equipo- 

 tential lines of the magnet, and the outlines of the pole being 

 distinctly marked by the absence of deposit. 



* Wartmann, Philosophical Magazine, III, xxx, p. 264, 1347. 



f American Chem. Jour., vol. iii, 157, vol. vi, 430. Science, vol. i, No. 2, 1883. 



Am. Jour. Sol— Third Series, Vol. XLV, No. 270.— June, 1803. 

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