Vol. 33. JUNE 1892. • No. 205, 



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



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL xMAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloclis 'Philosophical Magazine,' 

 Nicholsons l Journal , and Thomson s '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, 



FIFTH SERIES* 



N° 205.— JUNE 1892 



WITH THREE PLATES. 



Illustrative of Dr. G. J. Stoney's Paper on the Analysis of 

 of Sodium, and Mr. Walter Baily's on the Construction 

 Map. 



LONDON: 



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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. 

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



