n CONTENTS. 



Page 

 XL Researches on the structure of Metals, as indicated by their Acoustic 



properties. By M. Felix Savakt, . 104 • 



XII. On the Effects of the action of Cold on Animals, as exhibited in their 

 Hybernation and Lethargy. By M. Flourens, Member of the 

 Academy of Sciences, , . .Ill 



XIII. Account of the Siamese Twins, united by a cartilaginous band, 122 



XIV. Contributions to Physical Geography, . 129 



1. Description of the Falls of Gersuppah in North Canara, . ib. 



2. On the Climate of the Himmalaya, . 133 



3. Account of an Ascent of Mont Elbroutz, the highest peak of the 

 Caucasus, by a Russian party, . .134 



XV, Account of a series of Experiments on the construction of large Re- 

 flecting Telescopes. By the Right Honourable Loud Oxmantowk, 

 M. P. Communicated by the Author, , 136 



XVL Notice of some of the Birds of Madeira. By C. Heineken, M. D. 



Communicated by the Author. . . 145 



XVII. An experimental examination of the electric and chemical theories of 

 Galvanism. By William Ritchie, A. M. F. R. S., Rector of the 

 Royal Academy at Tain, . . 150 



XVII I. On the Discovery of the Hydrate of Magnesia in Anglesey. By Wil- 

 LIA3I Henry, M. D. F. R. S., &c. Contained in a Letter to Dr 

 HiBBERT, dated 6th December, . , 155 



XIX. HISTORY OF MECHANICAL INVENTIONS AND OF PRO- 

 CESSES AND MATERIALS USED IN THE FINE AND 

 USEFUL ARTS, . . .157 



On the Application of Steam to the purposes of destroying all Kinds 

 of Vermin on Board Ships, . . ib. 



XX. ANALYSIS OF SCIENTIFIC BOOKS AND MEMOIRS, 163 



1. The Article Ship*Building. Published in Vol. xviii. Fart I. 



of the Edinburgh Encyclopaedia. Edited by Dr Brewster, ib. 



2. The Hisrory of Insects, Vol. I Family Library, No. 7* 171 



3. Elements of Practical Chemistry, comprising a series of experi- 

 ments in every department of Chemistry, with directions for per- 

 forming them, and for the preparation and application of the most 

 important tests and reagents. By David Boswell Reid, Ex- 

 perimental Assistant to Professor Hope, Conductor of the Classes 



of Practical Chemistry in the University of Edinburgh, &c. &c &c. 176 



XXL PROCEEDINGS OF SOCIETIES, . 177 



1. Proceedings of the Royal Society of Edinburgh, . ib, 



2. Proceedings of the Society for the Encouragement of the Useful 

 Arts in Scotland, . . , ib. 



3. Proceedings of the Cambiidge Philosophical Society, . 180 



XXU, SCIENTIFIC INTELLIGENCE, , 181 



1. NATURAL PHILOSOPHY. 



Optics. — 1. Mr Faraday's Experiments on Flint-Glass for Achromatic Experi. 

 mcnts. 2, Two Large French Achromatic Object-Glasses purchased by 

 Mr South. 3. Dispute respecting the glass of the Dorpat Telescope, 181— i] 82 



