456 PROCEEDINGS OF THE ACADEMY OF [1819. 



Dr. F. V. Hayden. A fine collection of Geyserites, etc., Geysers 

 of the Yellowstone National Park. 



W. W. Jefferis. Lignite, Penna. R. R. Tunnel, Baltimore, Md.; 

 Bronzite,Bare Hills, Md.; Corundum and Culsageeite, Chester 

 Co., and Kyanite, Lancaster Co., Pa.; Micaceous Iron, Lake 

 Superior. 



Dr. Jos. Leidy. Steatite pseudomorph of Staurolite, Lisbon, N. 

 H.; Apophyllite, Isle Haute, Bay of Fundy. 



H. C. Lewis. Native Sulphur, Surry Co., N. C; Lignite, Kin- 

 kora, N. J.; Diatomaceous Earth, Richmond, Va. 



Dr. Linn. Muscovite with peculiar markings, Macon Co., N. C. 



W. L. Mactier. Amber, Nantucket, Mass. 



J. W. Peck. Calcite, from beneath a bed of upper Silurian Pen- 

 tamerus, Delhi, Ind. 



Theo. D. Rand. Twelve Rocks, Mahanoy City, Pa.; Diabase, near 

 Pottstown, Pa.; Euphyllite in Tourmaline, Pyrite, Quartz, 

 xls., Chester Co.; Almandine, Dixon's Quany, Delaware; 

 forty-four Rocks, neighborhood of Phila. ; Petroleum, Ennis- 

 killen, Canada; Willemite, Franklin, N. J.; Drusy Quartz, 

 Calcite, Montgomery Co., Pa.; Quartz, Andalusite, Delaware 

 Co., Pa. ; seventeen Rocks, Delaware Co., Pa. ; Stalactite, 

 Page Co., Ya. ; Molybdenite, Frankford, Phila. 



Dr. Ruschenberger. Obsidian, Mauna Loa, Hawaii, eruption of 

 3 856. 



W. S. Yaux. Cuprite, Cornwall, England; Pyrosmalite, Nord- 

 marken, Sweden; Gypsum, Monte Doneto, Bologna; four 

 crystals of Orthoclase, Baveno, Lake Maggiore, Italy; Axi- 

 nite, Medals, Switzerland ; Yanadinite, Lead Hills, Scotland ; 

 a fine specimen of Harmotome, Strontian, Scotland; Octahe- 

 dral Quartz and Hematite, St. Lawrence Co., N. Y.; Apatite 

 and Biotite, Burgess, Canada; Spinel, Orange Co., N. Y.; a 

 very fine specimen of Proustite, Chanarcillo, Copiapo, Chili. 



Jos. YVillcox. Corundum, from Chester Co., Pa., and Ala. ; Tour- 

 maline, Pyroxene, and Hornblende, St. Lawrence Co., N. Y. ; 

 Pyrophyllite, Chesterfield, S. C; Margarite, Andesite, Chester 

 Co., Pa.; Phlogopite, Apatite, Ontario, Canada ; twelve Stau- 

 rolites, Tannin Co., Ga. 



Minerals in exchange for duplicate books. Umenite, Bavaria; 

 Astrophyllite, El Paso Co., Cal.; Calcite in Limestone, Fluo- 

 rite and Calcite in Limestone, Millerite and Dolomite, St. 



