BIBLIOGRAPHY OF J. PETER LESLEY 541 



1885. A geological hand atlas of the 67 counties of Pennsylvania, embodying the 



results of the field work of the survey from 1874-1884. Second Geol. 

 Survey Pennsylvania, Report X, pp. cxii, 61 plates. 



1886. Annual report of the geological survey of Pennsylvania for 1885. Contains, 



along with administrative reports, the following papers by Lesley: 

 The coal beds and fireclays of the Wellersburg basin in Somerset 



county. Pp. 227-239. 

 Some general considerations respecting the origin and distribution of 

 the Delaware and Chester kaolin deposits. Pp. 571-591, with map 

 in atlas. 

 Some general considerations of the pressure quantity, composition, and 

 fuel value of rock gas, or the natural gas of the oil regions of Pennsyl- 

 vania, pp. 657-680. 

 (With E. Y. d'lnvilliers:) Report on Cornwall ore mines, pp. 491-570, 

 with map in atlas. 

 The geology of the Pittsburg coal region. Trans. Am. Inst. Mining Eng., vol. 

 14, pp. 618-656, plate. 

 1889. A dictionary of the fossils of Pennsylvania and neighboring states, named in 

 reports and catalogues of the survey. Three volumes, pp. xiv, 1283, with 

 appendices, xxxi, x, xiii pp., and 3.000 figures. 

 Revision and correction of the semi-bituminous coal section at Wellersburg, 

 in Somerset county, Pennsylvania. Geol. Survey Pennsylvania, with atlas 

 to Reports HH and HHH, pp. 349-360. 



1891. On an important boring through 2,000 feet of Trias in eastern Pennsylvania. 



Proc. Am. Phil. Soc,vo\. 29, pp. 20-24. 

 Artesian well in lower Silurian limestone at Parkersburg, Pennsylvania. 

 lb., vol. 29, pp. 45-47. 



1892. A summary description of the geology of Pennsylvania, vols, i and ii, Lau- 



rentian to Devonian, inclusive, pp. xix, 1628. 

 1895. The same, vol. iii, to p. 1854, Pocono and Mauch Chunk. 



In addition to the papers and volumes already mentioned, Professor 

 Lesley prepared elaborate prefaces and letters of transmittal to accom- 

 pany the reports of his assistants on their respective districts, not less 

 than twenty-four in number. In compiling this list the writer has made 

 full use of Mr Darton's work.* 



In the absence of the author the following memoir was read by Samuel 

 Calvin : 



MEMOIR OF PETER NEFF 

 BY H. P. CUSHING 



Peter Neff, late Fellow of this Society, was born in Cincinnati, Ohio, 

 April 13, 1827. Three or four generations of both paternal and maternal 

 ancestors had lived in this country and had been active and influential 



♦ Catalogue and index of contributions to North American geology, 1732-1891. By Nelson Horatio 

 Darton. U. S. Geol. Survey, Bull. No. 127, 1896. 



LXX— Bull. Geol. Soc. Am., Vol. 15, 1903 



