Vol.41. JANUARY 1896. No. 248. 



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



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AKB 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloch's 'Philosophical Magazine, 9 

 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. 



FIFTH SERIES. 



N° 248.— JANUARY 1896.__ 



// " fiRTRfiPHYSSCAL \V 



::• J 



LONDON: 



PBINTED BY TAYLOR AND FRANCIS, BED LION COURT, FLEET STREET. 

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