DAETON.] 



NORTH AMEEICAN GEOLOGY. 



819 



Powell, John "W. — Continued. 

 [On the classification and. nomencla- 

 ture of pre-Cambrian formations and 

 the work of the International Congress.] 

 International Cong. Geol., Am. Committee, 

 Eeports, 1888 A, pp. 65-06, 1888. 



[ ] Prevention of floods in the Lower 



Mississippi. 



Science, vol. 12, pp. 85-87, i°, 1888. 



[ ] Major Powell's report, operations 



of the national survey, Yellowstone 

 Park, Atlantic Coast, Archeau geology, 

 Glacial geology, Appalachian geology, 

 classihcation of soils. 



Science, vol. 12, pp. 148-150, 4°, 1888. 



The laws of hydraulic degradation- 

 Science, voL 12, pp. 229-233, 4°, 1888. 

 Eead to Nat. Acad. Sci., 1838. 



Tenth Annual Eeport of the United 



States Geological Survey. 



tr. S. Geol. Snrv., 10th Eeport, J. W. Powell, 

 pp. 3-80, plates 2-5, Waahington, 1890. 



[ ] TheiJoodingof theColorado Desert. 



Eng. and Mining Jonr.,Tol. 52, p. 9 (J col.), 

 4°, 1891. 



On the crystalline schists of the 



United States and their relations. In- 

 troduction. 



Congrds G6ol. International, CompteEendu, 

 4tli session, pp. 153-155, Londres, 1891. 



Po'well, W. B. Geological report upon 

 the Fourche Cove and its immediate 

 vicinity, with some remarks upon their 

 importance to the science of geology 

 [etc.], 22 pages, map. Little Eock, 1842. 



Pratt, N. A. Ashley Eiver phosphates. 

 History of the Marls of South Caro- 

 lina, and of the discovery and develop- 

 ment of the native bone phosphates of 

 the Charleston Basin, 42 pages, Phila- 

 delphia, 1868. 



Pratt, W. H. Eeport on a geological ex- 

 amination of the section of the hlufi's 

 recently exposed by the Chicago, Eock 

 Island and Pacific Eailroad. 



Davenport Acad, Sci., Proc, vol. 1, pp. 

 96-99, 1876. 



Section of the bluflf at Sixth street, 



Davenport, Iowa. 



Davenport Acad. Sci., Proc, vol. 3, pp, 127- 

 129, 1883. 



An artesian well at Moline [Illinois] . 



Davenport Acad. Sci,, Proc, vol. 3, pp. 181- 

 182, 1883. 



Pratt, W. H.— Continued. 



Geological section of the bluflf at 



East Davenport. 



Davenport Acad. Sci., Proc, vol. 3, pp. 106- 

 107, 1883. 



Prescott, . Largest bowlder in New 



Hampshire. 



Am. Jonr. Sci., 3d series, vol. 14, p. 495 

 (i p.), 1877. 



Prescott, William. A sketch of the ge- 

 ology and mineralogy of the southern 

 part of Essex County in Massachusetts. 

 Essex Nat. Hist. Soc, Jonr., vol. 1, pp. 

 78-91, 1852. 



Preston, E. B. Los Angeles County. 



California, 9tli Eeport of Mineralogist, pp. 

 189-210,1890. 



Lassen County. 



California, lOth Eeport of Mineralogist, pp. 

 272-276, 1890. 



Los Angeles County. 



California, 10th Eeport of Mineralogist, pp. 

 277-283, 1890. 



Mariposa County. 



California, 10th Eeport of Mineralogist, pp. 

 300-310, 1890. 



Modoc County. 



California, 10th Eeport of Mineralogist, pp. 

 332-335, 1890. 



Plumas County. 



California, 10th Eeport of Mineralogist, pp. 

 466-495,1890. 



Sutter County. 



California, 10th Eeport of Mineralogist, p. 

 691, 1890. 



Presfwich, Joseph . The past and future 

 of geology. 



Smithsonian Eeport for 1875, pp. 175-195, 

 1876. 



Price, Eli K. On the Glacial epochs. 



Am. Phil. Soc, Proc, vol. 16, pp. 241-276, 

 1877. 



Prime, Frederick, jr. On the occurrence 

 of the brown hematite deposits of the 

 Great Valley. 



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

 410-417, 1875. 



Am. Jonr, Sci., 3d series, vol. 9, pp. 433-440, 

 1875. 



Second geological survey of Penn- 

 sylvania, Eeport D, Eeport of progress 

 on the brown hematite ore ranges of 

 Lehigh County, with a description of 

 the mines lying between Emaus, Al- 

 burtis, and Fogelsville, 73 pages, map, 

 Harrisburg, 1875. 



Includes notes by J. P. Lesley, pp. 57-66. 



Abstract, Am. Jonr. Sci., 3d series, vol. 11, 

 p. 63 (i p.), 1876. 



