GLOSSARY

OF

TECHNICAL TERMS

USED IN MINING.

AIR-FUNNEL .—A large wooden box ofa circular shape, open on one side, with a vaneon the opposite side to turn its mouth to thewind; it is used to accelerate a current ofair through the downcast pit.

Brattices .—Partitions of wood used in ven-tilating the boards in which the miners areat work. In some instances where the cruelpractice of having only one shaft is adopted,brattices are used to divide it.

Brakemen .—Men employed to work the en-gines or other machinery used in winning thecoals.

Banksmen .—Men employed on the surfaceto unhook and empty the laden corves, as theyascend.

Bearing door .—A door which forces the airr 2