CONTENTS. 



PAGK 



Art. I. Chemical Examination of tlie Elie Pyrope or Garnet. 

 By Arthur Connell, Esq. Professor of Chemis- 

 try, University of St Andrews, F.R.S.E., &c. 

 Communicated by the Author, . . . 209 



II. Researches in Elucidation of the Distribution of Heat 

 over the Globe, especially of the Climatic Fea- 

 tures peculiar to the Region of the United States. 

 By Samuel Forry, M.D., Author of " The Cli- 

 mate of the United States, and its Endemic In- 

 fluences," Editor of " The New York Journal of 

 Medicine, and the Collateral Sciences," &c., Con- 

 cluded from page 105, . . . • 213 



III. Sources of Fluorine in Fossil Bones, . . . 235 



IV. On " Gutta Percha," a peculiar variety of Caoutchouc. 



By Douglas Maclagan, M.D., F.R.S.E., &c. 

 Communicated by the Royal Scottish Society of 

 Arts, 238 



V. On Pseudomorphous Minerals. By Dr J. Reinhard 



Blum, 241 



VI. Observations on Pseudomorphism. By J. D. Dana, 



Esq., 251 



VII. A new Self- Acting Method of Taking the Buckets 

 from the Pit Mouth, and Shutting off the Steam 

 from the Winding Engine. By Mr Daniel Er- 

 SKiNE, F.R.S.S.A., (with a Plate). Communicated 

 by the Royal Scottish Society of Arts, . 264 



