/ 



1. 40. DECEMBER 1895. No. 247. 



Published the First Day of every Month. — Price 2s. 6d. 



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of TillocKs 'Philosophical Magazine,* 

 Nicholson'' s 'Journal,' and Thomson's 'Annals of Philosophy.' 



CONDUCTED BY 



LORD KELVIN, LL.D. P.R.S. &c. 



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. 



becrefary s Horary, 



FIFTH SERIES. N^sr/Tim^ 



N° 247.— DECEMBER 1895. 



LONDON: 



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