Vol. '27. FEBRUARY 1889. No. 165. 



Published the First Day of every Month.' 



THE I Hl lb mi} J 

 LONDON, EDINBURGH, AHpilg gMN ,,i->^ 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



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

 Nicholson s 'Journal,^ and Thomson's 'Annals of Philosophy.^ 



CONDtrCTED 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" 165.— FEBRUARY 1889. 



WITH SIX PLATES. 



Illustrative of Mr. Nagaoka's Paper on the Combined Effects of Torsion 

 and Longitudinal Stress on the Magnetization of Nickel, Messrs. J. 

 BoTTOMLEY and A.TAis^AKADATii's Note on the Magnetization of Nickel, 

 • and Mr. James C. McConni:l's Paper on the Polarization of Sky Light. 



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