Vol. 11. APRIL 1881. No. 68. 



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 TillocKs l ''Philosophical Magazine} 

 Nicholson's l Journal f and Thomson's i 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.A.S. F.C.S. 



~'k- 



N° 68.— APRIL 1881. 



WITH A PLATE. 



Illustrative of Dr. C. R. A. Weight's Paper on the Determination of 

 Chemical Affinity in terms of Electromotive Force. 



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