The Menominee Iron Range : its cities, their industries and resources, being a sketch of the discovery and development of the great iron ore beds of the North, situated within portions of the States of Michigan and Wisconsin south of Lake Superior : submitted as a hand-book for the information of those seeking a profitable field for labor and investment . ted by the fabulous value of its mineral. As you sit listening to the exciting experiences of your guide, but which after allbear no comparison with the thrilling adventures of the coal miner, the muffled sound ofthe steam drills working in d
The Menominee Iron Range : its cities, their industries and resources, being a sketch of the discovery and development of the great iron ore beds of the North, situated within portions of the States of Michigan and Wisconsin south of Lake Superior : submitted as a hand-book for the information of those seeking a profitable field for labor and investment . ted by the fabulous value of its mineral. As you sit listening to the exciting experiences of your guide, but which after allbear no comparison with the thrilling adventures of the coal miner, the muffled sound ofthe steam drills working in distant stopes reaches you. The subdued noises born of thissteady boring, suggests mammoth beetles, or teredo worms, or colossal moles, burrowingtheir unseen way through the unexplored foundations of the world, whilst the blow ofdistant pick and hammer possesses the place like the articulate summons of some giantdeath-watch, and the hiss of compressed air sings through these cold granite halls likethe dirges of sirens. And it is cold. Round the nozzles of the air pipes, the ice has formed a heavy sil-the keen draughtsploiting alongchill you to yourThese steam drillsinstitution. Withit will take aboututes to sink a footof ore. In jasper oran hour. With apound hammer issonal observationupon, the strikerblows of the ham-Recent experi-according to Iron. A Load of Wisconsin Logs. ver compress, andwhich come ex-clammy causewaysvery marrow,are a wonderfulthe old hand drilltwenty-five min-in an ordinary veinrock it would takehand drill an eightused, and if per-is to be depended£i will give thirtymer in a minute,ments in Norway,Age, demonstrated that in driving a level in exceptionally hard horn-blendic gneiss by hand and by rock-drill, respectively, in a square of six feet, six inches, the cost of labor for the samegiven result was 70 per cent, of the total cost, as against 55 per cent, of the total infavor of the air drill. So much again for the conquests of science. The average rateo
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectironmin, bookyear1891
