Pol. 45. JANUARY 1873. No. 297 



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 e 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. 



AND 



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



FOURTH SERIES. 



N° 297.— JANUARY 1873. 



WITH TWO PLATES, 



Illustrative of Dr. R. Konig's Paper on Manometric Flames, Dr. A. M. 

 Mayer's on an Acoustic Pyrometer, and Dr. A. Stoletow's on the 

 Magnetizing-Function of Soft Iron. 



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