Upton Sinclair

“ Striking into soft, greasy coal, one would open a pocket of this gas, a deposit laid up for countless ages, awaiting its predestined victim. A man might sink to sleep as he lay at work, and if his "buddy," or helper, happened to be out of sight, and to delay a minute too long, it would be all over with the man. ”

“ Hal knew that the mountain air in this region was famous for its dryness; he learned now that the quality which meant life to invalids from every part of the world meant death to those who toiled to keep the invalids warm. Driven through the mines by great fans, this air took out every particle of moisture, and left coal dust so thick and dry that there were fatal explosions from the mere friction of loading-shovels. So it happened that these mines were killing several times as many men as other mines throughout the country. ”

“ The North Valley mines were especially "gassy," it appeared. In these old rambling passages one smelt a stink as of all the rotten eggs in all the barn-yards of the world; and this sulphuretted hydrogen was the least dangerous of the gases against which a miner had to contend. ”