CONTENTS. 



Page 

 Art. I. Biographical Memoir of Sir Benjamin Thomson, 



Count Rumford. By Baron Cuvier, - 209 



II. Observations on the Action of the Mineral Acids on Cop- 

 per, under different circumstances. Bj' John Davy, 

 M. D. F. R. S., Physician to the Forces. Commu- 

 nicated by Sir James M'^Grigor, Director-General 

 of the Army Medical Board, - - 229 



III. On the Mean Temperature of the Atmosphere and of 



the Earth, in some parts of East Russia. By Pro- 

 fessor A. T. KuPFBR. With a Plate of Isogeother- 

 mal Lines, . _ _ - - 233 



IV. On peculiar Noises occasionally heard in particular 



Districts, with some further Remarks on the produc- 

 tion of these Sounds. Communicated by the Au- 

 thor, _ . - _ . 258 

 V. On the Geographical Characters and Geognostical Con- 

 stitution of Spain. By Professor Hausmann of 

 Gottingen. Communicated by the Author, - 267 

 VI. Description of an Apparatus for Evaporating Fluids, 

 and also for separating Salts from their aqueous so- 

 lution by Crystallization without the aid of the Air- 

 pump. By P. A. Von Bonsdorf, Professor of 

 Chemistry in the Alexander University in Finland, 278 

 VII. Observations on the Theory of Capillary Action given 

 in the Supplement to the Encyclopaedia Britannica. 

 By Edward Sang, Esq. Teacher of Mathematics. 

 Communicated by the Author, - - 280 

 VIII. Account of the Larva of a supposed CEstrus Hominis, 

 or Gad-Fly, which deposites its Eggs in the Bodies 

 of the Human Species ; with the particulars of a Case 

 communicated by Dr Hill of Greenock, 



