VI 



CONTENTS. 



of certain Fossil Acotyledonous Plants in the Secondary 

 Strata of Fredericksburg, Va. By Richard C. Taylor, 

 F.G.S. Lond., &c. &c., 314 



20. On the Anthracite Deposit at Taraaqua, Schuylkill county, 

 Pennsylvania, with a Map and Section. By H. Koehler, 

 Esquire, 326 



21. Account of the Travertin deposited by the vs^aters of the 

 Sweet Springs, in Alleghany county, in the state of Vir- 

 ginia, and of an ancient Travertin discovered in the adja- 

 cent hills. By G. W. Featherstonhaugh, Geologist to 

 the United States, Fellow of the Geological Societies of 

 London and Pennsylvania, &;c., .... 328 



22. Observations on a portion of the Atlantic Tertiary Region. 



By T. A. Conrad, Hon. Mem. Geol. Soc. Penns., &c. 335 



23. Theory of Rain, Hail, Snow and the Water Spout, de- 

 duced from the latent Caloric of Vapour and the specific 

 Caloric of Atmospheric Air. By James P. Espy, Esquire, 

 Mem. Geol. Soc. Penns,, &c. &c., . . . 342 



24. Notice of the Os Ilium of the Megalonyx Laqueatus, from 

 Big Bone Cave, White comity, Tennessee. By Richard 

 Harlan, M.D., &c., . . . . . . 347 



25. Description of the remains of the " Basilosaurus," a large 

 Fossil Marine Animal, recently discovered in the Hori- 

 zontal Limestone of Alabama. By Richard Harlan, 

 M.D., &c., 348 



26. Notice of Native Lon from Pen Yan, Yates county. New 

 York. By Thomas G. Clemson, Mem. Geol. Soc. 

 Penns., &c., 358 



27. On the Science and Practice of Mining. By James Dick- 

 son, F.G.S. Lond., &c. &c., ..... 360 



28. Miscellaneous Intelligence, . . . . „ 409 



