CONTENTS 



Page 

 Art. I. Biographical Memoir of Dr Joseph Priestlev. Read 



to the Institute of France. By Baron Cuvier, 209 



II. Facts in regard to the Hybernation of the Chimney 

 Swallow (Hirundo rusticaj. By the Reverend Co- 

 lin Smith of Inverary. In a Letter to Professor 

 Jameson, , - - - 231 



III. Thermometrical Observations, at Pitt-Town, New^ 

 South Wales. By the Reverend John Macgarvie, 

 A. M. Minister of the Scots Church, Portland Head. 

 In a Letter to James Dunlop, Esq. Paramatta. 

 (Communicated by Mr Dunlop), - - 234 



IV. On the Materials which the Romans employed in 

 their Buildings. By Mr C. T. Ramage, A. M. of 

 Naples. Communicated by the Author, - 246 



V. On the Covering of Birds, considered chiefly with re- 

 ference to the description and distinction of Species, 

 Genera, and Orders. By Mr W. Macgillivray, 

 Assistant to the Regius Keeper of the Edinburgh 

 College Museum, and Corresponding Member of 

 the Wernerian Natural History Society. Commu- 

 nicated by the Author, - - - 253 



VI. On Isopyre, a new Mineral Species. By W. Hai- 

 dinger, Esq. F. R. S. E. Communicated by the 

 Author, - - - - - 263 



VII. Chemical Examination of Isopyre. By Edward Tur- 

 ner, M. D. F.R.S.E. Lecturer on Chemistry, Edin- 

 burgh. Communicated by the Author, - 265 

 VIII. Biographical Notice of Count Lacepede, and account 



of his Work on the Natural History of Fishes, 267 



IX. 1. On Osmelite, a New Mineral Species. 2. Descrip- 

 tion of a new Species of Pyrites. 3. Mineralogical 

 Examination of Russian Platina Sand. By Professor 

 Breithaupt of Freyberg, - - 271 



