Vol.11. JUNE 1881. No. 70 



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



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



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. &c. 



AND 



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



FIFTH SERIES. ^ 



N° 70.- JUNE 1881. **<?> 



WITH FOUR PLATES. 



Illustrative of Mr. R. H. M. Bosanquet s Paper on Beats of Consonances 



of the Form h : 1. 



With this (the regular Number for June 1881) is published, and should 

 be delivered to Subscribers, the Supplement (No. 71) to Vol. XL, 

 containing papers by Mr. E. H. Cook, Mr. R. H. M. Bosanquet, 

 Prof. Helmholtz, Messrs. Gladstone and Teibe, Prof. A. G-. Bell, 

 Dr. O. J. Lodge, Messrs. Wanklyn and Cooper, together with Notices 

 respecting New Books, Proceedings of the Geological Society, Intelligence. 

 and Miscellaneous Articles, and the Title-page, Table of Contents, and 

 Index to Vol. XL 



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