THE STORY OF ROCK DRILLING Part 6

Description

Shows various types of drills and bits performing jobs for which they are designed. Reel 1: Shows drilling equipment being used to located iron in New York, to loosen ore in a mine, and to sink a shaft in a Michigan mine. Reel 2: Drills are being used to obtain granite at a New England quarry and to make a canal at Niagara Falls, Canada.

Collection

Records of the U.S. Bureau of Mines

Series

Public Information Films and Video Recordings