First Century of National Existence: The United States as They Were and are ... Mineral Wealth ... Public Lands ... Internal Trade ... Immigration ... Banking ... Insurance ... Literature and Authors ...L. Stebbins, 1874 - 586 pages |
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Page 22
... surface , and are collected by exca- of the business depends , in great part , upon vating the clay beds and sorting out the the convenience of the supplies of fuel and balls of ore . The excavations have been of ores , of each of which ...
... surface , and are collected by exca- of the business depends , in great part , upon vating the clay beds and sorting out the the convenience of the supplies of fuel and balls of ore . The excavations have been of ores , of each of which ...
Page 27
... surface , and has been worked in numer- ous great open excavations to about 100 feet in depth , the ore prevailing throughout among the clays and sands from top to bot- tom . " The floor of the mine is hard , white Potsdam sandstone ...
... surface , and has been worked in numer- ous great open excavations to about 100 feet in depth , the ore prevailing throughout among the clays and sands from top to bot- tom . " The floor of the mine is hard , white Potsdam sandstone ...
Page 31
... surface was covered with a forest of oak , the trees thriving in a soil wholly composed of fragments of peroxide of iron , comminuted and coarse mixed together . Loose lumps of the ore were scattered around on every side but the north ...
... surface was covered with a forest of oak , the trees thriving in a soil wholly composed of fragments of peroxide of iron , comminuted and coarse mixed together . Loose lumps of the ore were scattered around on every side but the north ...
Page 36
... surface nearly oxygen enough to consume it , and thus produce extreme rapidity , in- tensity , and thoroughness of combustion . This pulverization is effected , for the first time , by an ingenious machine invented by Messrs . Whelpley ...
... surface nearly oxygen enough to consume it , and thus produce extreme rapidity , in- tensity , and thoroughness of combustion . This pulverization is effected , for the first time , by an ingenious machine invented by Messrs . Whelpley ...
Page 38
... surface , or if preferred , through a cylinder thirty feet or more in height , and open at both ends , into which air is constantly forced . He claims to have tested this process very thoroughly and to be capable of making pure iron or ...
... surface , or if preferred , through a cylinder thirty feet or more in height , and open at both ends , into which air is constantly forced . He claims to have tested this process very thoroughly and to be capable of making pure iron or ...
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