ol.9. 



JUNE 1880. 



No. 58. 



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



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloch's 'Philosophical Magazine? 

 Nicholson's 'Journal J and Thomson's 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. 



FIFTH SERIES. 



N° 58.—JUNE 1880. 



LONDON: 



PRINTED BY TAYLOB AND FBANCIS, BED LION COUBT, FLEET STBEET, 



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

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