id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
38903	Hoskin, Arthur J. (Arthur Joseph)	The Business of Mining A brief non-technical exposition of the principles involved in the profitable operation of mines			.txt	text/plain	38324	2024	68	methods in the mining of precious metal ore. mines for the extraction of metallic contents from the ores. which have made him famous among mining men, says, "Ore dressing is an work of carrying on operations in a railroad tunnel is not mining; the driving of adits through barren rocks to reach ore bodies is not mining; dividends paid by the gold and silver mining companies of the United the copper mining companies of the United States exceed the combined The mining of low-grade _gold_ ores by open-pit methods has taken hold per ton of ore mined is said to average 55 cents. With shaft mines, having deep workings and low grades of ore, ores upon, or close to, the mining property. The Portland Gold Mining Company, operating a great property at Victor, There are districts that have many small gold and silver mines with ores	./cache/38903.txt	./txt/38903.txt