Safety catches on mine cages and methods of testing them.

Creator Personal:

East, J. H., Jr. , Harrington, D. (Daniel), 1878-

Title:

Safety catches on mine cages and methods of testing them.

Call Number:

P19455

Date:

1948

Description:

Serial issue. Issued as: United States. Bureau of Mines. Information circular, 7436 (1948).

Subject Topical:

Mine safety.