Pennsylvania Statutes Title 52 P.S. Mines and Mining § 653. Record of coal mined

At every anthracite coal-mine in this Commonwealth, where coal is mined and paid for by the car, a record of all cars of coal mined shall be kept at the miners' chutes, or at the most convenient and practical of said chutes, where said coal is loaded, in cars, which record shall be the final basis in computing the miners' earnings per car, without any deduction for any slate or other refuse that may be loaded on said car or cars in the usual and natural course of mining and loading coal, and which record shall be open at all times for the inspection of all miners.