CONTENTS. V 



Page. 



delphia, April 5, 1841 ; by Prof. Edward Hitchcock, 

 LL.D., 233 



III. Notice of a Flora of North America ; by John Torrey, 



M. D., F. L. S. &c., and Asa Gray, M. D. &c., . . 275 



IV. A Sketch of the Infusoria, of the family Bacillaria, with 



some account of the most interesting species which have 

 been found in a recent or fossil state in the United States ; 



by Prof J. W. Bailey, .284 



V. Observations on Bills of Mortality, with a proposal for their 



improvement ; by James Mease, M. D,, die, . . 306 

 VI. Meteorological Observations made at Hudson, Ohio, during 



the years 1838, 1839 and 1840; by Prof Elias Loomis, 310 

 VII. Meteorological Summary of the Weather at Montreal, 



Province of Canada ; by J. S. M'Cord, Esq., . . 330 



VIII. Observations on the Secondary and Tertiary Formations 

 of the southern Atlantic States ; by James T. Hodge. 

 With an Appendix ; by T. A. Conrad, . . . 332 

 IX. Analysis of various Ores of Lead, Silver, Copper, Zinc, 

 Iron, &c., from King's Mine, Davidson County, North 

 Carolina ; by Prof James C. Booth, .... 348 

 X. Improvement in the Daguerreotype process of photography ; 



by Prof F. A. P. Barnard, 352 



XI. On two decomposed varieties of lolite ; by Prof Charles 



Upham Shepard, ....... 354 



XII. Steam Navigation to the Pacific by the Isthmus of Panama 



and along the Western Coast of South America, . . 358 



XIII. Bibliographical Notices: — A discourse on the character, 

 properties, and importance to man, of the natural family 

 of plants called Gramineae or True Grasses, 365. — Lemons 

 de Botanique, comprenant principalement la Morphologie 

 Vegetale, la Terminologie, la Botanique Comparee, I'Ex- 

 amen de la valeur des Caracteres dans les diverses famil- 

 ies naturelles, etc., 371. — Genera Plantarum secundum 

 Ordines Naturales disposita : Nomenclator Botanicus, seu 

 synonymia plantarum universalis, enumerans ordine al- 

 phabetico nomina atque synonyma, turn generica tum spe- 

 cifica, et a Linnoeano et a recentioribus de re botanica 

 scriptoribus plantis phanerogamis imposita, 373. — Kunze, 

 Supplemente der Riedgraser (Carices) zu Schkuhr's Mo- 

 nographic, &c. : Hooker and Arnott's Botany of Capt. 

 Beechey's Voyage : Elemens de Teratologie Vegetale, ou 



