CONTENTS. 



XXX. Proceedings of Learned Societies .. .. .. 182 



XXXI. Intelligence and Miscellaneous Articles .. ] 84 



XXXI I. Account of a Series of Experiments ', shoving the 

 Effects of Compression in modifying the Action of Heat. 

 By Sir James Hall, Bart. F.R.S. Loud, and Edin. 193 



XXX in. Catalogue of Specimens, showing the Result of 

 Sh James Hall's Experiment^ on. the Effects of Heat 

 modified In Compression ; which were deposited by Sir 

 James Hall in the British Museum on the 28/ h of June 

 1606 215 



XXXIV. Memoir upon the Germination and Fermentation of 

 G>-ob?s and Farinaceous Substances. By Messrs. Vau- 

 auELiN and Fourcroy 219 



XXXV. Observations upon the Disease, in Sheep, called in 

 England Foot-rot. By M. Charles Pictet, of Ge- 

 neva 227 



XXXVI. On two Species of the Sp ft ex or Wasp, found in 

 Virginia and Pennsylvania, and probably existing through 

 all the United State,. By H. Latrobe, Esq. . . 236 



XXXVII. Description and Manner of using M. Montgol- 

 FTER'i Calorimeter, an Apparatus for determining the com- 

 parat ve Quantities of Heat flemished by various Descrip- 

 tions of Combustibles 241 



XXXVIII. i'htmical Observations upon Spathic Iron. By 

 M. Collet Descostils, Engineer of Mines. Read at 

 the Class of the Sciences in the French National Institute, 

 January 6, 1806 245 



XXXIX. Description of an Improved Crane and Flexible 

 Chains. By Mr. Gilbert Gilpin, of Old Park Iron- 

 works, near SI tifnal 252 



XL. Description of Mr. Peter Herbert's Improved Book- 

 case Bolt 259 



XLI. Notices of Experiments made by the Galvanic Society 

 of Paris. By M. Riffault, one of the Members 26Q 



XLI I. Description of a Check for Carriage Wheels on Rail- 

 Roads. By Mr. CHARLES Le Caan, of Llanelly, Car- 

 marthenshire . . . . , 263 



XLI II. Experiments made upon new Ivory, fossil Ivory, and 

 the Enamel of Teeth, '///order to ascertain if these Sub- 

 stances contained, Fluoric Acid. By Messrs, Fourcm>y 

 and Vausuelin. Read in the French institute . . 205 



XLIV. "Proceedings of Learned. Societies. 268 



JCLV, Intelligence and Miscellaneous Articles .. 280 



XLVI. Extract from M. Klaproth's Memoir upon the 

 Sulphuric Acid. Read at the Fhilotnutic Society of Berlin 



2 ho 

 XLVI I. Prinm 



