Vol. 10. SEPTEMBER 1880. No. 61 



Publislied the First Day of every Month. — Price 2s. 6d. 



THE 

 LONDON, EDINBURGH, ahd DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloclis 'Philosophical Magazine? 

 Nicholson's 'Journal? and Thomson's 'Annals of Philosophy,' 1 



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. 



FIFTH SERIES. 



N° 61.— SEPTEMBER 1880. 



WITH FOUR PLATES. 



Illustrative of Mr. J. W. Clark's Paper on the Behaviour of Liquids and 

 Gases near their Critical Temperatures, Dr. E. Goldstein's on the 

 Electric Discharge in Rarefied Gases, and Captain Aenet's on the 

 Reversal of the Developed Photographic Image. 



LONDON: 



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Sold by Longmans, Green, Reader and Dyer ; Kent and Co. ; Simpkin, Marshall and 

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