Chicago : [Popular Engineering Pub. Co.] · leaf 730
iven for to Clarksdale, but the operators and the cage to move up or down in the deep other help are all of the same class of shaft. people that have built the town. The picture shows a Flory hoist in Mound Bayou is situated in the delta, the St. Clair mine, St. Clair, Pa. Even and in a rich… … HOW THE ELECTRIC MINE LIFT IS OPERATED
Electricity
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