Vol. 17. FEBRUARY 1884. No. 104. 



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



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of 'Pillock's ''Philosophical Magazine] 

 Nicholsons i Journal] and Thomson's l Annals of Philosophy.'' 



CONDUCTED BY 



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

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



AND 



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



FIFTH SERIES. 



N° 104.— FEBRUARY 1884. 



WITH A PLATE. 



Illustrative of Prof. Silvanus P. Thompson's Paper on a new Insulating 



Support. 



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