Most of the machinery used in these mines is moved by rude hydraulic turbine wheels and steam power. The machinery generally consists of one or more batteries of four large mallet triturators of the California system and one or more cups in which the... Bulletin - Página 160por International Bureau of the American Republics - 1892Vista completa - Acerca de este libro
| Bureau of the American Republics (Washington, D.C.) - 1892 - 204 páginas
...the waters of the River Wawa for extracting the ore, the output can not fall below 600 to 800 ounces. Most of the machinery used in these mines is moved...California system and one or more cups in which the ore is beate/i or ground. In Boaco, of the same department of Chontales, there are two mines, but they are... | |
| International Bureau of the American Republics - 1892 - 224 páginas
...17 ioo to 150 El Javali *oV 2OO tO 3OO San Miguel .... . . I tO 2 30 to 40 San Gregorio (t) (t) IOO tO 2OO Most of the machinery used in these mines is...ancient system that they call molinete. The first produce! 200 ounces, the second 128. In the department of Segovia the mines are richer, but the badcondition... | |
| United States. Bureau of Manufactures - 1893 - 626 páginas
...pound) to three-quarters of an ounce per pound" (sic). •f" Ounces per ion and carat not obtainable." Most of the machinery used in these mines is moved...system that they call molinete. The first produces 200 ounces, the second 128. In the department of Segovia the mines are richer, but the bad condition... | |
| Archibald Ross Colquhoun - 1895 - 508 páginas
...carats. Most of the machinery used is moved by rude hydraulic turbine wheels and primitive steam-power. The machinery generally consists of one or more batteries of four large mallet triturators of the Californian system, the ore being beaten or ground in cups. In Boaco there are two mines operated in... | |
| ARCHIBALD ROSS COLQUHOUN - 1898 - 836 páginas
...carats. Most of the machinery used is moved by rude hydraulic turbine wheels and primitive steam-power. The machinery generally consists of one or more batteries of four large mallet triturators of the Californian system, the ore being beaten or ground in cups. In Boaco there are two mines operated in... | |
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