LEADER 02645ckmaa2200241 a 4500001    9954067323506421
005    20200924150804.0
008    080304s1950                       n   ^^
035    (NjP)5406732-princetondb
035     |z(NjP)Voyager5406732
040    NjP |cNjP |eappm
100 1  Hulbert, Edward Phinney, |ecompiler.
245 00 Pennsylvania Coal Company : |bphotographs of the gravity railroad near Scranton : |kphotographs, |f1950.
300    .20 |flinear ft.(1 |fhalf-size archival box)
545 1  Gravity railroads preceded steam locomotives by about a decade. The term refers to cars moving along wood and iron tracks, descending down inclined planes only by the forces of gravity, and returning by a cable or pulley system. They were used most notably in the transportation of anthracite coal from northeastern Pennsylvania mountain tops. Initially, horses or mules powered the return trip, which were later replaced by steam engines. The earliest gravity railroads had single tracks, which limited traffic, and rope or hemp cables that broke frequently. The Pennsylvania Coal Company's gravity railroad was in operation between lower Pittston and Hawley (Pa.) from 1850 to 1884.
520 2  Consists of ten photographs of the Pennsylvania Coal Company Gravity Railroad, which was used to transport coal from mines near Scranton, Pa. Each photograph is accompanied by a typed explanation of the scene depicted. |bThe photographs and the descriptions were used in a paper published for the Lackawanna Historical Society in 1949 by Edward Hulbert (Princeton Civil Engineering Class of 1900), titled "The Pennaylvania Coal Company Gravity Railroad." On the description of photograph no. 3 is an ink inscription indicating the purpose of the photographs and noting that they were presented to Arthur M. Greene, Jr., in July 27, 1950.
520 2  Included with the photographs is a letter, dated July 27, 1950, from Hulbert to Princeton University's first dean of the School of Engineering, Arthur Maurice Greene, Jr., reminding Greene of his talk during the recent Princeton University reunion about the gravity railroad. A penciled response by Greene to Hulbert is on the verso.
541     |cGift ofDean Arthur Maurice Greene, |dFebruary 21, 1951. |eAM 14308.
610 20 Pennsylvania Coal Company |xHistory |vSources.
650  0 Coal mines and mining |zPennsylvania |zScranton |y19th century |xHistory.
650  0 Railroads, Gravity |zPennsylvania |zScranton |y19th century |xHistory.
655  7 Photographs |y19th century. |2aat
700 12 Greene, Arthur Maurice, |d1872-1953, |eformer owner. |5NjP |0http://id.loc.gov/authorities/names/nr96030208
902    dib |bo |6a |7m |da |f1 |e20080304