VI CONTENTS. 



Page. 



XIII. Abstract of the Proceedings of the Eleventh Meeting 



of the British Association for the Advancement of Sci- 

 ence, held at Plymouth, September, 1841, - - 317 



XIV. An Astronomical Machine, the Tellurium ; by Edwin 



C. Leedom, M. D., - - - - - 338 



XV. Abstract of a Meteorological- Journal, for the year 1841, 



kept at Marietta, Ohio ; by S. P. Hildreth, M. D., - 344 

 XVI. The Glacial Theory of Prof. Agassiz ; by Charles 



Maclaren, - - - - - - 346 



XVII. On a New Species of Trilobite of very large size ; by 



Prof. John Locke, M. D., - - - - 366 



XVIII. Register of the Thermometer from 1830 to 1839, kept 



at Boston, Mass. ; by J. P. Hall, - - - 368 



XIX. Chemical Examination of Bituminous Coal from the pits 



of the Mid Lothian Coal Mining Company, south side 

 of James River, fourteen miles from Richmond, Vir- 

 ginia, in Chesterfield County ; by Prof. B. Sillibian 

 and Prof. 0. P. Hubbard, - - - - 369 



XX. Bibliographical notices : — Linnasus's Botanical Writings : 



Index to DeCandolle's Prodromus, 375. — Kunth, Enu- 

 meratio Plantarum : Loudon's Arboretum et Fruticetum 

 Britannicum, 376. — Steudel's Nomenclator Botanicus : 

 Torrey and Gray's Flora of North America : Mr. Nut- 

 tail's Edition of Michaux's Sylva Americana : Botari- 

 cal Teacher, 377. — Agassiz's Monograph of the Echi- 

 nodermata, 378. — Boston Journal of Natural History, 

 379. — Harris's Report on the Insects of Massachusetts, 

 injurious to Vegetation : Rogers's Letters on the Man- 

 ufacture of Iron, 380. 



Miscellanies. — Protest of Mr. Charles V. Walker, 383. — Min- 

 eralogical Notices, 386. — Infusorial Animals : Coal Mines in 

 Cuba, 388. — Encouragement for the Fine Arts : Geological 

 Survey of Louisiana, 390. — Preparation of Freshwater Shells 

 for the Cabinet, 391. — Bones of the Orycterotherium : Note 

 to Mr. Lea's paper on New Species of Native Shells, 392. — 

 Facts connected with a stroke of Lightning, 393. — Separa- 

 tion of Silver or Gold from Lead, 394. — Suggestions on the 

 total Solar Eclipse of July, 1842, 395.— Meteors of April 

 18-20, 1841, 397.— Shooting Stars of Dec. 7, 1838, 398.— 



