DABTON.] 



NORTH AMERICAN GEOLOGY. 



391 



Poster, J. W., and Whitney, J. D,— Con- 

 tinued. 



[General sketoli of geology of 



Lake Superior copper region.] 



tr. S. General Laud Office, Report, for 1850, 

 pp. 147-152, 3l8t Cong., 2d sess., House Ex. 

 Doc. No. 9 ["Washington, 1850], 



Report on tlie geology and to- 

 pography of a portion of the Lake Su- 

 perior land district, in the State of 

 Michigan, Part I, copper lands, 224 

 pages, plates 12, maps, Washington, 

 1850. 



Notice and excerpts in Am. Jour. Sci., 2d 

 series, vol. 12, pp. 222-239, 1851. 



[Aperju de I'ensemble des ter- 

 rains siluriens du Lac Sup6rieur.] 



Soo. G^ol. France, Bull., 2d series, vol. 8, pp. 

 89-101, 1851. 

 Discussed by Marcou, ibid., pp. 101-105, 1851. 



Geology of the Lake Superior 



land district. Part II. 



Eeport on the geology of the Lake Superior 

 land district, by Foster and Whitney, Part II, 

 the iron region, together with general geology, 

 pp. 1-139, 176-177, 183-194, 195-202, platea.maps, 

 special sess., March, 1851, Senate Ex. Doc. 

 No. 4, "Washington, 185L 



Extracts in Am. Jour. Sci., 2d series, vol. 15, 

 pp. 295-296; TOl. 17, pp. 11-33, 12. 



On the elevation of mountain 



chains. 



Eeport on the geology of Lake Superior 

 land district by Foster and "Whitney, Part 

 II, the iron region, together with the general 

 geology, pp. 274-284, special sess., March, 

 1851, Senate Ex. Doc. No. 4, "Washington, 

 1851. 



On the age of the sandstone of 



Lake Superior, -with a description of 

 the phenomena of the association of 

 igneous rocks. 



Am. Assoc, Proc, vol. 5, pp. 22-38, 1851. 

 Abstract, See. G-6ol. France, Bull., 2d series, 

 vol. 9, p. 313 (i p.), 1852. 



On the different systems of ele- 

 vation which have given configuration 

 to North America, wiih an attempt to 

 identify them with those of Europe. 

 Am. Assoc, Proc, vol. 5, pp. 136-151, 1851. 

 On the Azoic system as devel- 

 oped in the Lake Superior land district. 

 Am. Assoc, Proc, vol. 5, pp. 4-7, 1851. 

 Soc. G6ol. France, Bull., 2d series, vol. 9, pp_ 

 312-313 (§p.), 1852. 



On the origin and stratigraphi- 



cal relations of the trappean rooks of 

 Lake Superior. 



Annual of Sci. Discovery, 1861, p. 285, 1862. 



Poster, "William. Colorado, California, 

 Montana, Utah, etc. [building stones], 

 loth Census U. S., Eeport on the building 

 stones of the United States and statistics of 

 the q^narry industry forl880, bound as part of 

 Vol. X, but with separate pagination, pp. 277- 

 279, 4°, "Washington, 1884. 



Po-wrler, Samuel. An account of the sap- 

 phire and other minerals in Newton 

 Township, Sussex County, N. J. 

 Am. Jour. Sci., vol. 21, pp. 319-320, 1832. 

 Pox, Robert "W. Origin of mineral veins. 

 Franklin Inst., Jour., 2d series, vol. 21, pp. 

 251-252, 1838. 



Prazer, John F. Report on minerals for- 

 warded by General Smith. 



Geology and industrial resources of Cali- 

 fornia, by P. T. Tyson, pp. 116-117, Balti- 

 more, 1851. [Another edition, "Washington, 

 1850.] 



Prazer, Persifor, jr. Mines and minerals 

 of Colorado. 



Eeport of "United States geological survey 

 of Colorado and New Mexico under F. Y. 

 Hayden, 3d Annual Eeport, pp. 201-228, "Wash- 

 ington, 1873. 



[On some geological features of Iron 



Mountain and Mine La Motte, Mo.] 

 Philadelphia Acad. Sci., Proc, vol. 26, pp. 

 85-86, 1874. 



On the geology of certain lands in 



Ritchie and Tyler counties, "W. "Va. 

 Philadelphia Acad. Sci., Proc, vol. 26, pp. 

 168-172, 1874. Eemarks by J. P. Lesley, p. 172. 



"Weathering of [trap] rocks [in the 



vicinity of Gettysburg, Pa.] . 



Philadelphia Acad. Sci., Proc, vol. 26, p. 

 228 (i p.), 1874. 



Remarks on York County iron ores 



and geology.] 



Am. Inst. Mining Bug., Trans., vol. 3, pp. 

 421-422, 1875. 



Notes on the characters of the lower 



Silurian slates at their outcrops. 



Philadelphia Acad. Sci., Proc. for 1875 [vol. 

 27], p. 76 (i p.), 1875. 



On thin sections of the traps of the 



Mesozoic basin, 



Philadelphia Acad. Sci., Proc for 1875 [vol. 

 27], p. 72 (I p.), 1875. 



On the Trias of York County, Pa. 



Philadelphia Acad. Sei.,Proc. for 1875 [vol. 

 27], p. 123 (i p.), 1875. 



On the structure of the York County 



"Valley limestone and on micropho- 

 tography of minerals. 



Philadelphia Acad. Sci., Proc. for 1875 [vol. 

 27], pp. 128 -129, 1875. 



