This type of drill changed mining. It replaced hand drilling in the 1870's. It was so heavy that two men were needed to carry it. One miner would crank the machine, the other would change drills and throw water in the holes. Where holes angled upward, no water could be used, so holes were drilled dry. With miners working in such dry conditions, cases of silicosis were reported.

Online Exhibits:
Annie Clemenc
Two Man Drill
Foundry - Casting Metal Products
The Hospital
Sheffield Pump Car
Loading Ore Cars