Vol.41. MAY 1896. No. 252. 



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



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloch's 'Philosophical Magazine, 3 

 Nicholson's ' Journal f and Thomson's l Annals of Philosophy.' 



CONDUCTED BY 



LORD KELVIN, LL.D. F.R.S. (fee. 



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. 



^^w^ 0/V/ 



FIFTH SERIeL/^^^^orv. 



N° 252.— MAY 1896 



LONDON: 



PRINTED BY TAYLOR AND FRANCIS, RED LION COURT, FLEET STREET. 

 Sold by Simpkin. Marshall, Hamilton, Kent, and Co., Ld. ; Whittaker and Co. ; 

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 Glasgow: — Hodges, Figgis, and Co., Dublin :— Putnam, New York :— Veuve J. 

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