Vol.2. JULY 1876. No. 8. 



Published the First Bay of every Month. — Price 2s. 6i. 



THE 

 LONDON, EDINBUKGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloclis 'Philosophical Magazine? 

 Nicholson's 'Journal J and Thomson's l 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. <fce. 



AND 



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



FIFTH SERIES. 



N° 8.— JULY 1876. 



1* V3r 



LONDON: 



PBINTED BY TAYLOB AND PBANCIS, BED LION COUBT, FLEET STBEET, 



Printers and Publishers to the University of London. 

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

 Co. ; and Whittaker and Co. ;— and by A. and C. Black, and Thomas Clark, Edin- 

 burgh; Smith and Son, Glasgow:— Hodges, Foster, and Co., Dublin :— Putnam, 

 New York : — and Asher and Co., Berlin. 



