﻿Pol. 38. 



NOVEMBER 1894. 



No. 234, 



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



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloch's ( Philosophical Magazine' 

 Nicholsons 'Journal,' and Thomson's c 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° 234.-NOVEMBER 1894. 



WITH FOUR PLATES. 



Illustrative of Mr. C. E. St. John's Paper on Wave-Lengths of Elec- 

 tricity on Iron Wires ; Mr. F. L. O. Wadswobth's on a New Method 

 of Magnetizing and Astaticizing Galvanometer-Needles ; and Mr. J. 

 B. Hendeeson's on the Effects of Magnetic Fields on the Electric Con- 

 ductivity of Bismuth. 



LONDON: 



pbinted by taylob and fbancis, bed lion coubt, fleet stbeet. 

 Sold by Simpkin, Marshall, Hamilton, Kent, and Co., Ld. ; Whittaker and Co. ; 

 and by A. and C. Black ;-T. and T. Clark, Edinburgh; Smith and Son, 

 Glasgow: — Hodges, Figgis, and Co. Dublin :— Putnam, New York: — Veuve J. 

 Boyyeau, Paris : — and Asher and Co., Berlin. 



