(Mining.) The ventilating shaft of a mine out of which the air passes after having circulated through the mine; distinguished from the downcast. Called also upcast pit, and upcast shaft.
... busy in a manner that would not have disgraced Tertullian with the eternal welfare of those city fathers whose obstinacy had fixed the palace at Princhester. He walked up and down the platform, gripping his hands very tightly behind him, and maintaining a serene upcast countenance by a steadfast effort. It seemed a small matter to him that the placards of the local evening papers should proclaim "Lloyd George's Reconciliation Meeting at Wombash Broken up by Suffragettes." For a year now he had observed a strict ... — Soul of a Bishop • H. G. Wells
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