Vol. 24. OCTOBER 1887. No. 149. 



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



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE. 



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v 



vz 



JOURNAL OF SCIENCE. 



ii 



Being a Continuation of TillocKs 'Philosophical Magazine,' 

 Nicholson's 'Journal,' and Thomsons '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. <fec. 



AND 



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



FIFTH SERIES. 



N° 149.— OCTOBER 1887. 

 WITH TWO PLATES. 



Hlustrative of Mr. John Buchanan's Paper on Hot Gases as Conductors 

 of Electricity, and Mr. J. T. Bottomley's on Expansion and 

 Contraction with Rise and Fall of Temperature in Wires under 

 Elongating Stress. 



LONDON: 



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



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