Drilling and blasting in some American coal mines
Subtitle: This series of diagrams is presented to assist the operator who wishes to attain the most effective system of drilling and blasting
By: by Theodore Marvin ...
Publisher: Hercules Powder Co.
Published: 1927
Place of publication: Wilmington, Del.]
Language: eng
Number of pages: 12
Subjects: Blasting
Notes: Cover-title.

"Reprinted from The Explosives engineer."

"From a paper read at the February, 1926, meeting of the American Institute of Mining and Metallurgical Engineers."