This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...four or five tons at a scoop and can be operated by only four or five men. So rapidly do the shovels work that a car holding fifty tons can be loaded in five or ten minutes. Five hundred men working hard all day could not accomplish so much as one of these machines. In less than three hours a fifty-car train can be ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...four or five tons at a scoop and can be operated by only four or five men. So rapidly do the shovels work that a car holding fifty tons can be loaded in five or ten minutes. Five hundred men working hard all day could not accomplish so much as one of these machines. In less than three hours a fifty-car train can be loaded and Copyright, Keystone View Co. Fig. 62. Steam Shovel At Work, Burt Mine, Mesabi Range made ready to start to some shipping center. To get this amount of ore from a shaft mine would require two or three days. From one mine in the Mesabi Range one half as much ore has been taken in a year as from the whole country of Sweden in the same length of time. A few mines in the same range are producing more iron every year than is mined in the whole country of France, which ranks high among the iron-producing countries. In some of the mines the ore has been removed to the depth of from fifty to two Copyright, Keystone View Co. Fig. 63. Overlooking The Ore Docks, Two Harbors, Minnesota hundred feet, and a seemingly inexhaustible supply remains, while new mines are being opened every year. All iron must first be separated from the other substances with which it is found in the earth before it is ready for manufacture. To do this great heat is necessary, and consequently much coal is required. The iron is therefore transported from the mines to the coal regions to be smelted. Let us follow it in its journey to the smelting furnaces. Our fifty-car train leaves the mine bound for Duluth, one of the iron-shipping ports at the western end of Lake Superior. We might go either to Superior or to Two Harbors instead, for in each of these places there are immense ore docks, stretching out perhaps a half mile into the lakes; the largest iron-ore docks in the w...
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Add this copy of Geographical and Industrial Studies: United States to cart. $47.75, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2018 by Palala Press.
