Vol. 23. JANUARY 1887. No. 140. 



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 Tilloch'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.O.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. 



FIFTH SERIES. \^%^ c 



N° 140.— JANUARY 1887. 



% 

 WITH ONE PLATE. 



Illustrative of Mr. J. J. Coleman's Paper on Liquid Diffusion. 



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