V r ol. 17. MARCH 1884. 



No. 105. 



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



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloclis '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. &c. 



AND 



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



- _ . /,„ __ 



FIFTH SERIES. ,' ^? }p rV 



N° 105.— MARCH 1884. 



WITH FIVE PLATES. 



Illustrative of Lord Rayleigh's Paper on Acoustical Observations, Prof. 

 R. Bunsen's on the Condensation of Carbonic Acid on Smooth Glass 

 Surfaces, Messrs. Lodge and Clark's on the Phenomena exhibited 

 by Dusty Air in the neighbourhood of strongly Illuminated Bodies, 

 and Mr. S. P. Langley's on Wave-lengths in the Invisible Prismatic 

 Spectrum. 



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