CONTENTS. Vll 



Page. 



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

 therium, ......... 371 



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



of November 13 and 14, 1838, 372 



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



around Saturn, ........ 373 



51. Solar Painting, . . - 374 



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



54, Dr. Hare's nevir Eudiometer, ...... 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 vrater 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 U. S. Exploring Expedition — Mechan- 

 ical Vaporization of Earths by distillation, . . . 398 



65, 66. 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, 402 



