Vol. 39. JUNE 1895. No. 241. 



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 TillocVs 'Philosophical Magazine,' 

 Nicholson's 'Journal? and Thomson's 'Annals of Philosophy,' 



CONDUCTED BY 



LORD KELVIN, LL.D. P.R.S. Ac. 



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° 241.—JUNE 1895. ^ 



WITH TWO PLATES. 



Illustrative of Prof. A. Schuster's Paper on the Scale-Value of the 

 late Dr. Joule's Thermometers. 



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