From "The Coal Industry" magainze, September 1919, titled, "Pittsburgh the Greatest Coal Center":
"Pittsburgh, the greatest coal, steel and industrial center in the world has become during the week beginning September 29 the mecca to the technical and operating men of the mining industry...
"Many of the mines of Western Pennsylvania are operating almost without the use of horses or mules, all coal being transported by mechanical methods. The haulage ways are so well lighted that they resemble the streets of a great city. Brick and concrete is being used to arch the shaft bottoms and many of the entries and workshops which would have done credit to manufacturing establishments of recent years are found many hundred feet under ground. Lathes, shapers, hammers and equipment superior to that found on the surface at large mines a few years ago are now located in the large underground machine shops. Much of the coal from the openings of later years is being hoisted by means of skip hoisting and the most improved types of coal handling, cleaning and screening equipment is very much in evidence, proving that the coal operator is making an effort, in the Pittsburgh district, to give value received to the consumer and that he is, as never before, investing in machinery for larger and better production...
"The pick method of mining, or undercutting, has become obsolete and is a recollection with most of the men in the district. The most modern undercutting machines are doing the work, formerly done by the miner, and increasing the output to a marked degree. All manner of mining machines are operated under the varying conditions prevalent in this district...
"Emergency hospitals which are an improvement over the general wards in city hospitals a few years ago, are not uncommon at the mines. These hospitals with physicians and trained nurses extend the influences in the form of emergency first aid packets into the pockets of workmen in the most distant working places under the hill."