CONTENTS. VU 



44, 45. Solid impressions and casts of Drops of Rain — Mega- 



therium, 



46, 47. Hot Springs — Additional Observations on the Meteors 



48, 49, 50- Stars Missing — Double Stars — Five or more rings 



around Saturn, ...•-... 

 51- Solar Painting, .,-..-.. 



54. Dr. Hare's new Eudiometer, 



Page. 



371 



of November 13 and 14, 1838, ..... 372 



373 

 374 



52, 53. Aurora Borealis of Sept. 3, 1839 — Geological Survey, 375 



383 



55. Fall of a Meteorite in Missouri, Feb. 13, 1839, . . 385 



56. Explosions in American Coal Mines,, . • . . 387 



57. 58. Relative temperature of the water of the Saco river, 



and the atmosphere for the years 1837 and 1838 — British 

 Association, - - • -•.... 



389 



59, Proceedings of the Boston Society of Natural History, . 391 



60, British Antarctic Expedition, ' • 397 



61, 62, 63, 64. Liquefaction of Carbonic Acid— A new Mineral 



— Progress of the IT. S. Exploring Expedition — Mechan- 



ical Vaporization of Earths by distillation, . . . 398 

 65, GO. New Hall of the Academy of Natural Sciences at Phil- 

 adelphia— Dr. Hare's method of removing the resin which 

 contaminates the best Oil of Turpentine of commerce by 

 an alcoholic solution of Chloride of Calcium, . . 399 



67, 68. British Annual and Epitome of the progress of Science 



for 1838 — Longitude of New York, . . . • 400 



69. Jay's Catalogue of Shells, 3d edition, . . . .401 



70. Lizards in Chalk, 403 



