Transactions of the American Institute of Mining Engineers, Том 18The Institute, 1890 |
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Страница 56
... lead was practiced to some extent in the early days of mining in Colorado ; but , owing to the scarcity of the latter metal , lead - smelting can hardly be said to have been successful . When I 56 PROGRESS OF METALLURGICAL SCIENCE IN ...
... lead was practiced to some extent in the early days of mining in Colorado ; but , owing to the scarcity of the latter metal , lead - smelting can hardly be said to have been successful . When I 56 PROGRESS OF METALLURGICAL SCIENCE IN ...
Страница 57
... lead , and at a cost for freight alone of $ 130 per ton , the lead required for the reduction of silver - ores ; and , in the sum- mer of 1874 , the old Swansea works , near Denver , used granulated lead for the reduction of silver ...
... lead , and at a cost for freight alone of $ 130 per ton , the lead required for the reduction of silver - ores ; and , in the sum- mer of 1874 , the old Swansea works , near Denver , used granulated lead for the reduction of silver ...
Страница 60
... lead - ores , yet it would appear to have some merits when used for smelting ores con- taining copper , in lieu of lead , as a base for collecting the precious metals . For convenience I have tabulated the peculiar conditions of the two ...
... lead - ores , yet it would appear to have some merits when used for smelting ores con- taining copper , in lieu of lead , as a base for collecting the precious metals . For convenience I have tabulated the peculiar conditions of the two ...
Страница 61
... lead , as a means of collecting the silver and gold contained in the ores , it can hardly be said to represent copper smelting , for this metal plays only a small part as regards the value of the output . Although the general principles ...
... lead , as a means of collecting the silver and gold contained in the ores , it can hardly be said to represent copper smelting , for this metal plays only a small part as regards the value of the output . Although the general principles ...
Страница 64
... lead . VI . is slag produced from ores containing much zinc . The ratio of the oxygen in the base to that in the ... lead is present in the ore , a portion of this metal replaces the iron in the matte . This frequently occurred in former ...
... lead . VI . is slag produced from ores containing much zinc . The ratio of the oxygen in the base to that in the ... lead is present in the ore , a portion of this metal replaces the iron in the matte . This frequently occurred in former ...
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acid albertite alloy aluminum amount analysis anthracite apex assay average beds bitumen blast calorimeter carbon cassiterite cast cast-iron cent charge chute claim coal color Colorado combustion Company containing copper crucible cubic cyanide deflection deposits depth diagram diameter district elasticity elaterite end-lines engineers feet fracture furnace geological gold grammes gray porphyry Grms heat inches Iron Hill lead Leadville limestone lode lode-claim magnetite manganese mass melted metal method miles mineral mines nearly nitric acid obtained ore-bodies ore-deposits oxide paper percentage phosphorus planes plates porphyry portion potassium potassium cyanide pounds powder present produced pyrites quantity quartz quartzite rails remelted roasting rock sample schists shaft shown shrinkage silica silicon silver slag smelting solution specific gravity steel strength sulphate sulphide sulphur surface Table temperature tests thickness tion tons upper vein vertical weight zinc
Популарни одломци
Страница 881 - Mining claims upon veins or lodes of quartz or other rock in place bearing gold, silver, cinnabar, lead, tin, copper, or other valuable deposits, heretofore located, shall be governed as to length along the vein or lode by the customs, regulations, and laws in force at the date of their location.
Страница 885 - But their right of possession to such outside parts of such veins or ledges shall be confined to such portions thereof as lie between vertical planes drawn downward as above described, through the end lines of their locations, so continued in their own direction that such planes will intersect such exterior parts of such veins or ledges.
Страница 220 - REPORT ON THE CLAY DEPOSITS of Woodbridge, South Amboy and other places in New Jersey, together with their uses for firebrick, pottery, &c.
Страница 904 - States governing their possessory title, shall have the exclusive right of possession and enjoyment of all the surface included within the lines of their locations, and of all veins, lodes, and ledges throughout their entire depth, the top or apex of which lies inside of such surface lines extended downward vertically, although such veins, lodes or ledges may so far depart from a perpendicular in their course downward as to extend outside the vertical side lines of such surface locations.
Страница 186 - ... into the conflicting survey than may be necessary to make such end line parallel to the other end line and at the same time embrace the ground so held and claimed. The useless practice in such cases of extending both the side lines of a survey into the conflicting survey and establishing an end line wholly within it, beyond a point necessary under the rule just stated, will be discontinued.
Страница 885 - ... so long as they comply with the laws of the United States, and with State, Territorial, and local regulations not in conflict with said laws of the United States governing their possessory title...
Страница 885 - May, eighteen hundred and seventy-two, so long as they comply with the laws of the United States, and with State, Territorial and local regulations not in conflict with the laws of the United States...
Страница 881 - A mining claim located after the tenth day of May, eighteen hundred and seventy-two, whether located by one or more persons, may equal, but shall not exceed, one thousand five hundred feet in length along the vein or lode ; but no location of a mining claim shall be made until the discovery of the vein or lode within the limits of the claim located.
Страница xi - Members shall be professional mining engineers, geologists, metallurgist*, or chemists, or persons practically engaged in mining, metallurgy, or metallurgical engineering-. Associates shall include all suitable persons desirous of being connected with the Institute, and duly elected as hereinafter provided. Each person desirous of becoming a member or associate shall be proposed by at least three members or associates, approved by the Council, and elected by ballot at a regular meeting...
Страница xii - The duties of the president, vicepresidents, treasurer and secretary, shall be such as usually pertain to their offices, or ma'y be delegated to them by the unanimous vote of the executive committee.