Vol.5. JANUARY 1878. No. 28. 



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



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND • 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloclis '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. 



WILLIAM FRANCIS, Ph.D. F.L.S. F.R.A.S. F C.S. 



FIFTH SERIES. 



N° 28.— JANUARY 1878. 



WITH TWO PLATES, 



Illustrative of Dr. O. J. Lodge's Paper on a Form of Daniell Cell 

 convenient as a Standard of Electromotive Force, and Professors 

 Ayrton and Perry's on Ice as an Electrolyte. 



LONDON: 



PRINTED BY TAYLOR AND FRANCIS, RED LION COURT, FLEET STREET, 

 Printers and Publishers to the University of London. 

 )ld by Longmans, Green, Reader and Dyer j Kent and Co. ; Simpkin, Marshall and 

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