Transactions of the American Institute of Mining Engineers, Том 18The Institute, 1890 |
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Страница 6
... entirely with the mixture , and this be allowed to remain a little while before being poured off , the coating will be less uniform ; on the sides , part of the naked crucible will be exposed , and the lining at the bottom , being too ...
... entirely with the mixture , and this be allowed to remain a little while before being poured off , the coating will be less uniform ; on the sides , part of the naked crucible will be exposed , and the lining at the bottom , being too ...
Страница 10
... entirely accomplished ; in fact , upon removing the outer lid , when the crucible had been taken from the fire , but had not yet cooled , a strong odor of sulphurous acid was perceived , showing that not only had the air been excluded ...
... entirely accomplished ; in fact , upon removing the outer lid , when the crucible had been taken from the fire , but had not yet cooled , a strong odor of sulphurous acid was perceived , showing that not only had the air been excluded ...
Страница 13
... long in a very hot fire ; the buttons , however , remaining free from iron . Although the results in the naked crucible were entirely satis- factory with normal conditions of temperature and time , the THE DRY ASSAY OF TIN - ORES . 13.
... long in a very hot fire ; the buttons , however , remaining free from iron . Although the results in the naked crucible were entirely satis- factory with normal conditions of temperature and time , the THE DRY ASSAY OF TIN - ORES . 13.
Страница 19
... entirely excluding the air . In regard to scorification , it seems doubt- ful whether it can be avoided so as to give satisfactory results . ( 1. ) Ricketts recommends mixing 10 grammes of ore with 10 to 20 grammes of fluorspar or ...
... entirely excluding the air . In regard to scorification , it seems doubt- ful whether it can be avoided so as to give satisfactory results . ( 1. ) Ricketts recommends mixing 10 grammes of ore with 10 to 20 grammes of fluorspar or ...
Страница 28
... entirely removed , some tin will be lost , and the resulting weight will be too low ; if all the tin is recovered , some slag remains with it , and the result is too high . Thus , the assayer must choose between two evils , and this ...
... entirely removed , some tin will be lost , and the resulting weight will be too low ; if all the tin is recovered , some slag remains with it , and the result is too high . Thus , the assayer must choose between two evils , and this ...
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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.