. 40. SEPTEMBER 1895. No. 244. 



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



THE ' 



LONDON, EDINBURGH, and DUBLIN 



'HILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloclis '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° 244.— SEPTEMBER 1895. 



WITH THEEE PLATES. 



lustrative of Mr. H. F. W. Burstall's Paper on the Measurement of 

 Cyclically Varying Temperature ; and Profs. J. Dewar and J. A. 

 Fleming's on the Variation in the Electrical Eesistance of Bismuth, 

 when cooled to the Temperature of Solid Air. 



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