VI CONTENTS. 



VII. On the Education of James Mitchell, the young Man 

 born Blind and Deaf. By Henry Dewar, M. D. 

 F. R. S. Edin. . Page 137 



VIII. On the Optical Properties of Muriate of Soda, Fluate 

 of Lime, and the Diamond, as exhibited in their 

 action upon Polarised Light. By David Brewster, 

 LL. D. & F. R. S. Lond. & Edin. and F. A. S. 

 Edin. - - - 157 



IX. On a New Optical and Mineralogical Property of 

 Calcareous Spar. By David Brewster, LL. D. 

 F. R. S. Lond. & Edin. and F. A. S. Edin. 165 



X. On the Ancient Geography of Central and Eastern 

 Asia, with Illustrations derived from Recent Dis- 

 coveries in the North of India. By Hugh Mur- 

 ray, Esq. F. R. S. Edin. - - 171 



XL An Analysis of Sea-Water ; with Observations on the 

 Analysis of Salt-Brines. By John Murray, M. D. 

 F. R. S. Edin. - - 205 



XII. Elementary Demonstration of the Composition of Pres- 

 sures. By Thomas Jackson, LL. D. F« R. S. 

 Edin. and Professor of Natural Philosophy in the 

 University of St. Andrew's, - - 245 



XIII. Account of the remarkable Case of Margaret Lyall, 



who continued in a State of Sleep nearly Six 

 Weeks. By the Rev. James Brewster, Minister 

 of Craig. Communicated by Dr Brewster, 249 



XIV. A General Formula for the Analysis of Mineral Wa- 



ters. By John Murray, M. D. t. R. S. Edin. 259 



-(Part 



