The Online Books Page

Books by H. P. Greenwald:

Books in the extended shelves:

• Greenwald, H. P. (Harold Putnam), 1893-: Characteristics of fuel pitches and their explosibility in pulverized form (U.S. Dept. of the Interior, Bureau of Mines, 1940), also by Irving Hartmann and H. C. Howarth (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Coal-dust explosibility factors indicated by experimental mine investigations 1911 to 1929 (U.S. Bureau of Mines, 1929), also by George S. Rice and United States Bureau of Mines (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Coal-dust explosion tests in the experimental mine 1913-1918, inclusive (Govt. print. off., 1922), also by George S. Rice, Willard Leo Egy, and Lewis M. Jones (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Coal-dust explosion tests in the experimental mine 1919 to 1924, inclusive (Govt. Print. Off., 1927), also by George S. Rice and J. W. Paul (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Coal-mine ventilation factors (U.S. G.P.O., 1929), also by G. E. McElroy (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Compressibility and bearing strength of coal in place : tests of lateral compression of Pittsburgh coal bed (U.S. Dept. of the Interior, Bureau of Mines, 1933), also by G. S. Rice, S. Avins, and United States Bureau of Mines (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Crucible Mine of the Crucible Fuel Co. (U.S. Dept. of the Interior, Bureau of Mines, 1939), also by Earl R. Maize (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Effect of changes in moisture and temperature on mine roof. [No.] 1, Report on strata overlying the Pittsburgh coal bed (U.S. Dept. of the Interior, Bureau of Mines, 1941), also by Irving Hartmann (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Experimental mine (U.S. Dept. of the Interior, Bureau of Mines, 1936), also by George S. Rice (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Experimental mine (U.S. Dept. of Commerce, Bureau of Mines, 1933), also by George S. Rice, H. C. Howarth, and United States Bureau of Mines (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Experiments on strength of small pillars of coal in the Pittsburgh bed (U.S. Dept. of the Interior, Bureau of Mines, 1939), also by Irving Hartmann and H. C. Howarth (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Explosibility of coal dust from four mines in Utah (U.S. Dept. of Commerce, Bureau of Mines :, 1927) (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Explosibility of semianthracite, low-volatile bituminous-coal, and medium-volatile bituminous-coal dusts (U.S. Dept. of the Interior, Bureau of Mines, 1940) (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Explosion tests of Pittsburgh coal dust in the experimental mine, 1925 to 1932, inclusive (U.S. G.P.O., 1933), also by George Samuel Rice and Henry C. Howarth (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Gibson Mine of the Hillman Coal & Coke Co. (U.S. Dept. of the Interior, Bureau of Mines, 1940), also by Earl R. Maize and Edward Thomas (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Laboratory studies of the inflammability of coal dusts : effects of fineness of coal and inert dusts on the inflammability of coal dusts (U.S. G.P.O., 1935), also by Albert Lawrence Godbert, Safety in Mines Research Establishment (Great Britain), and United States Bureau of Mines (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Laboratory testing of the inflammability of coal and other dusts conducted by the Bureau of Mines (U.S. G.P.O., 1932), also by George S. Rice (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Notes on large-scale tests of the explosibility of coal dusts made in the United States and Great Britain (U.S. Dept. of the Interior, Bureau of Mines, 1939) (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Progress report : experiments on strength of small pillars of coal in the Pittsburgh bed (U.S. Dept. of the Interior, Bureau of Mines, 1941), also by Irving Hartmann and H. C. Howarth (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Propagation of flame in mixtures of natural gas and air (U.S. Dept. of the Interior, Bureau of Mines, 1928), also by H. F. Coward (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Resistance of coal mine entries to the flow of air (Washington, D.C. : United States Departments of the Interior, Bureau of Mines, 1924., 1924), also by J. W. Paul, G. E. McElroy, and United States Bureau of Mines (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Rock-dust barriers for coal mines (U.S. Dept. of Commerce, Bureau of Mines, 1929), also by George S. Rice, H. C. Howarth, and United States Bureau of Mines (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Tests of a barrier using rock dust in paper bags (U.S. Dept. of the Interior, Bureau of Mines, 1938), also by H. C. Howarth and United States Bureau of Mines (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Tests of rock-dust barriers in the experimental mine (U.S. G.P.O., 1932), also by George S. Rice and Henry C. Howarth (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Tests on the ignition of natural gas-air mixtures by permissible explosives in the experimental coal mine (U.S. Govt. Print. Off., Bureau of Mines, 1949), also by Irving Hartmann, John Nagy, and H. C. Howarth (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Tests on the leakage of mine ventilating doors (Washington, D.C. : United States Department of the Interior, Bureau of Mines, 1924., 1924), also by J. W. Paul, G. E. McElroy, and United States Bureau of Mines (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: Use of wetting agents for allaying coal dust in mines (U.S. Dept. of the Interior, Bureau of Mines, 1940), also by Irving Hartmann (page images at HathiTrust)
• Greenwald, H. P. (Harold Putnam), 1893-: What do we know about the explosibility of coal dust in mines? (U.S. Dept. of Commerce, Bureau of Mines, 1929) (page images at HathiTrust)

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