Reports of the Inspectors of Mines of the anthracite and bituminous coal regions of Pennsylvania, for the year .. . great ad-vantage to the roads and mules. Mine boss, H. D. Thomson. 302 Reports of the Inspectors of Mines. [No. 13, Youghiogheny shaft.—This mine has been kept fully up to the require-ments of the act. The average amount of air in circulation per minuteis 22,800 cubic feet, the distribution is very good. The air shaft hasbeen lined and a stairway put in, so that it can be used as an escapeshaft in case of necessity. Mine boss, Isaac Dakin. Off. Doc.] Second Bituminous District. 3
![Reports of the Inspectors of Mines of the anthracite and bituminous coal regions of Pennsylvania, for the year .. . great ad-vantage to the roads and mules. Mine boss, H. D. Thomson. 302 Reports of the Inspectors of Mines. [No. 13, Youghiogheny shaft.—This mine has been kept fully up to the require-ments of the act. The average amount of air in circulation per minuteis 22,800 cubic feet, the distribution is very good. The air shaft hasbeen lined and a stairway put in, so that it can be used as an escapeshaft in case of necessity. Mine boss, Isaac Dakin. Off. Doc.] Second Bituminous District. 3 Stock Photo](https://c8.alamy.com/comp/2AJGX6J/reports-of-the-inspectors-of-mines-of-the-anthracite-and-bituminous-coal-regions-of-pennsylvania-for-the-year-great-ad-vantage-to-the-roads-and-mules-mine-boss-h-d-thomson-302-reports-of-the-inspectors-of-mines-no-13-youghiogheny-shaftthis-mine-has-been-kept-fully-up-to-the-require-ments-of-the-act-the-average-amount-of-air-in-circulation-per-minuteis-22800-cubic-feet-the-distribution-is-very-good-the-air-shaft-hasbeen-lined-and-a-stairway-put-in-so-that-it-can-be-used-as-an-escapeshaft-in-case-of-necessity-mine-boss-isaac-dakin-off-doc-second-bituminous-district-3-2AJGX6J.jpg)
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