Field notes in Delaware County
By: by C. E. Hall, with a colored geological map of the county, and thirty-nine photographic pictures of the granite quarries, the kaolin mines, the serpentine outcrops, and the castle rocks.
Contributors: Genth, F. A. 1820-1893
Series: Pennsylvania. Geological Survey, 2d. Report of progress -- C¿; Report of progress (Geological Survey of Pennsylvania) -- C5.
Publisher: Pub. by the Board of Commissioners for the Second Geological Survey
Published: 1885
Place of publication: Harrisburg
Language: eng
Number of pages: 128
Subjects: Hall, Charles Edward, -- 1852-; Geology -- Pennsylvania -- Delaware County.
Notes: "Published in advance of the Geological report on Delaware County, part 2, by J. P. Lesley."

Part 2 never published?

"Additional analyses of minerals and rocks from Delaware County, by F. A. Genth": p. 111C¿-120C¿.

Part 1.