Henry C Howarth

Mining Petroleum by Underground Methods

• Author(s): Carl Ernest Reistle, Charles Freeman Jackson, George Samuel Rice, George St. John Perrott, Kenneth Keith Kelley, Simon Harry Ash, Wilfred Charles Furness Shepherd, William Waugh Adams, Harold Putnam Greenwald, John Ballantine Knaebel, L. E. Geyer, Noah Arthur Tolch, Henry C. Howarth, L. Chenoweth

• Categories: Alkanes

• Type: Book
• -
• Published: 1932
• -
• Publisher: Unknown

None

Experiments on Strength of Small Pillars of Coal in the Pittsburgh Bed

• Author(s): Harold Putnam Greenwald, Henry C. Howarth, Irving Hartmann

• Categories: Coal mines and mining

• Type: Book
• -
• Published: 1939
• -
• Publisher: Unknown

None

The Effectiveness of Different-size Rock Dusts in Preventing Coal-dust Explosions in Mines

• Author(s): George Samuel Rice, Harold Putnam Greenwald, Henry C. Howarth

• Categories: Coal mines and mining

• Type: Book
• -
• Published: 1930
• -
• Publisher: Unknown

None

Catalog of Books and Reports in the Bureau of Mines Technical Library, Pittsburgh, Pa

• Author(s): United States. Bureau of Mines. Technical Library, Pittsburgh

• Categories: Library catalogs

• Type: Book
• -
• Published: 1968
• -
• Publisher: Unknown

None

Report of Investigations

• Categories: Mineral industries

• Type: Book
• -
• Published: 1965
• -
• Publisher: Unknown

None