CONTENTS. 



PAGE 



Art. I. On the Ancient City of the Aurunci, and on the Vol- 

 canic Phenomena which it exhibits ; with some 

 Remarks on Craters of Elevation, on the distinc- 

 tion between Plutonian and Volcanic Rocks, and 

 the theories of volcanic action which are at present 

 most in repute. With two Plates. By Charles 

 Daubeny, M.D., F.R.S., Professor of Chemistry 

 and Botany in the University of Oxford. Com- 

 municated by the Author, . . . .213 

 II. Miscellaneous Observations, chiefly Chemical. By 

 John Davy, M.D., F.R.S. , Lond. and Edin., 

 Inspector-General of Army Hospitals. Commu- 

 nicated by the Author, . . . .265 



III. Origin of the Constituent and Adventitious Minerals 



of Trap and the Allied Rocks. By James D. 

 Dana, 263 



IV. Observations on the Principle of Vital Affinity, as 



illustrated by recent observations in Organic Che- 

 mistry. By William Pulteney Alison, M.D., 

 F.R.S.E., Professor of the Practice of Medicine 

 in the University of Edinburgh, . . . 272 



V. On the Constitution and Properties of Picoline, a new 

 Organic Base from Coal-Tar. By Thomas An- 

 derson, M.D., F.R.S. E., Lecturer on Chemistry, 

 Edinburgh, ...... 291 



VI. On the Cause of Induration of some Siliceous Sand- 

 stones. By John Davy, M.D., F.R.S,, Lond. 

 and Edin., Inspector of Army Hospitals. Com- 

 municated by the Author, .... 300 



