Vol. 14. JULY 1882. No. 85. 



Published the First Day of every Month. — -Price 2s. Qd. 



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 

 JOUKNAL OF SCIENCE. 



Being a Continuation of Pillock's 'Philosophical Magazine,' 

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



CONDUCTED BY 



SIR ROBERT KANE, LL.D. F.R.S. M.R.I.A. F.C.S. 

 SIR WILLIAM THOMSON, Knt. LL.D. F.R.S. &c. 



AND 



WILLIAM FRANCIS, Ph.D. F.L.S. F.R^S. F.O.S. 



FIFTH SERIES 



N° 85.— JULY 1882. 



WITH TWO PLATES. 



Illustrative of Mr. C. Vernon Boys's Paper on Measurement of Curva- 

 ture and Eefractive Index, and Mr. P. D. Brown's Notes on Ther- 

 mometry. 



With this (the regular Number for July 1882) is published, and should 

 be delivered to Subscribers, the Supplement (No. 84) to Vol. XHI., 

 containing papers by Prof. H. A. Bowland, Mr. L. Fletcher, Prof. 

 J. TvNDAXL,Mr. W. G-. Lettsom, Mr. C. K. Wead, together with Notices 

 respecting New Books, Intelligence and Miscellaneous Articles, and the 

 Title-page. Table of Contents, and Index to Vol. XJJI. 



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