Testing of dynamite in a laboratory in the United States.
United States USA Date:1925 Duration:2 min 43 sec Sound:NO SOUND
A film on manufacture of dynamite in the United States. Laboratories for testing and research of dynamite. A chemist working in a laboratory. He tests every ingredient and every finished lot of material. Tests for sensitiveness and velocity are conducted. For conducting a test, gaseous and dusty conditions similar to those found in some coal mines are created. Explosives are fired in it to make sure that they will not ignite gas or dust before they are sent to the U.S. Bureau of Mines for approval as permissible explosives.
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