Show tits THE dynamic value of one pound of good flood steam coal is estimated by iroff Iro fW arogers DR as ail equi valant to tile the dorkof work of one man one day while three tons would to ra present ina his work tor for twenty years counting working days in a year ile iia urther farther estimates that a I 1 four our toot foot boom beam would yield ono one ton of good coal to tile the elnare yar dand that one square milo mile in area would represent tile tho labor of over ono one million men tor for 20 years |