Vol: 14. NOVEMBER 1882. No. 89 



i 



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



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AJS T D 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloclis 'Philosophical Magazine? 

 Nicholson's 'Journal? and Thomsons l Annals of Philosophy.'' 



CONDUCTED BY 



SIR ROBERT KANE, LL.D. F.R.S. M.R.I.A. F.C.S. 

 SIR WILLIAM THOMSON, Knt. LL.D. F.R.S. &c. 



AND 



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



N° 89.— NOVEMBER 1882. 



LONDON: 



PBTNTED BY TAYLOB AND FBANCLS, BED LION COUBT, FLEET STBEET, 



Sold by Longmans, Green, Eeader and Dyer ; Kent and Co. ; Simpkin, Marshall and 

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 New York : — and Asher and Co., Berlin. 



