>1. 29. . FEBRUARY 1865. No. 194 



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THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



bAiND 

 JOURNAL OF SCIENCE. 



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SIR DAVID BREWSTER, K.H. LL.D. F.R.S. L. & E. &c, 

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

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FOURTH SERIES. 



N« 194.— FEBRUARY 1865. 



WITH A PLATE, 



Illustrative of Mr. J, J. Waterston's Paper on some Electrical Experi- 

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Being a Continuation of Tilloch's e Philosophical Magazine, 9 

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