Vol. 34. SEPTEMBER 1892. No. 208. 



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 Tilloctis 'Philosophical Magazine/ 

 Nicholson s '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.R.A.S. F.C.S. 



FIFTH SERIES* 



N° 208.- SEPTEMBER 1892 



WITH FOI7B PLATES. 



Illustrative of Mr. Michelson's Paper on the Application 

 Interference Methods to Spectroscopic Measurements. 



LONDON: 



PRINTED BY TAYLOR AND FRANCIS. BED LION COURT, FLEET STREET. 



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, 

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