VIU CONTENTS OF VOL. XXXVI. — THIRD SERIES. 



Page 



Dr. Andrews's Report on the Heat of Combination 511 



Mr, G. Sloane on the Connexion of Pope Gerbert with the Geo- 

 metry of Boethius 529 



Proceedings of the Royal Society 540 



On the Application of Electro-Magnetism as a Motive Power, 

 by Mr. Robert Hunt 550 



Fibrous Hydrate of Magnesia, Nemalite of Nuttall, Thomson 

 and Connell 552 



Analyses of Pectolite and Stellite, and proposed Union of these 

 two Species, by J. D. Whitney 553 



Index 555 



PLATES. 



I. Illustrative of M. Regnault's Measurement of Temperature byThermo- 

 Electric Currents. 



II. and III. Illustrative of M. J. Plateau's new and curious Applications 

 of the Permanence of Impressions on the Retina. 



Errata. 



P. 237, equation (a.),/or^ read — . 



— 238, line 1,/oj- line in f read sine in f. 



— 239, — 10, /or little less read a little less. 



