86 



H. M. and Hon. E. I. Company's Troops serving in China, 

 from 1st April 1845 to 31st March ]846. 8vo. 



Contributions to the Military Medical Statistics of the Bombay Pre- 

 sidency, 1851. By John Kinnis, M.D. 8vo. — From the 

 Author. 



Proceedings of the Geological Society of London. Vol. IV,, Nos. 

 99, 101, 102, 103. 8vo. 



Quarterly Journal of the Geological Society of London. Nos. 21, 

 22, 23, 24, 25, 26, 27, 28. Q\o.—From the Society. 



Papers relating to the University of Sydney, and to the University 

 College, Sydney, New South Wales. Printed at the desire of 

 Sir J. F. W. Herschel, Bart., G. B. Airy, Esq., Professor 

 Maiden, and Henry Denison, Esq. 1851. 8vo, — From the 

 Editors. 



Journal of the Asiatic Society of Bengal. Nos. 208 to 210. Oct. 

 to Dec. 1849. 8vo. — From the Society. 



Proceedings of the Royal Astronomical Society. Vol. XI., No. 9. 

 8vo. — From the Society. 



Monday, 15(h December. 



Sir DAVID BREWSTER, K.H., Vice-President, in the 



Chair. 

 The following Communications were read : — 

 1. On the Centrifugal Theoi'y of Elasticity, and its con- 

 nection with the Theory of Heat. By W. J. M. Rankine, 

 Esq., C.E. 



This paper contains investigations founded on the supposition, 

 that that part of the elasticity of bodies which depends upon heat, 

 arises from the centrifugal force of the revolutions of the particles 

 of elastic atmospheres suiTounding nuclei or atomic centres. The 

 author has laid befox'e this Society and the British Association 

 several papers founded on this supposition, which he has elsewhere 

 t§rmed the hypothesis of molecular vortices. 



The author's previous investigations were confined to atoms in 

 which the particles of the elastic atmospheres might, without sensible 

 eri'or, be treated in calculation as being distributed in concentric sphe- 

 I'ical layers round their nuclei or centres, each layer being of equal 

 density throughout, and having its particles throughout in a similar 



