ol. 37. 



MARCH 1894. 



No. 226. 



Published the First Day of every Month. — Price 2s. Qd. 



:roW> 



THE 



LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloctis 'Philosophical Magazine/ 

 Nicholsons ( Journal/ and Thomson s l Annals of Philosophy J* 



CONDUCTED BY 



LORD KELVIN, LL.D. P.R.S. Ac. 



GEORGE FRANCIS FITZGERALD, M.A. Sc.D. F.R.S. 



AND 



WILLIAM FRANCIS, Ph.D. F.L.S. F.R.A.S. F.C.S. 



FIFTH SERIES. 



N° 226.— MARCH 1894. 



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