Transactions of the American Institute of Mining Engineers, Količina 1The Institute, 1873 |
Iz vsebine knjige
Zadetki 1–5 od 82
Stran 34
... course of extensive exploitation , have produced ores differing as widely as do those of the different zones enumerated by Mr. King . I am , in fact , strongly inclined to consider freedom from base metals , for in- stance , a ...
... course of extensive exploitation , have produced ores differing as widely as do those of the different zones enumerated by Mr. King . I am , in fact , strongly inclined to consider freedom from base metals , for in- stance , a ...
Stran 38
... course . Parallel with this , in the great limestone valley which lies along the margin of the coal- field , are the brown hematites , in such quantities at some points , especially in Virginia , Tennessee , and Alabama , as to fairly ...
... course . Parallel with this , in the great limestone valley which lies along the margin of the coal- field , are the brown hematites , in such quantities at some points , especially in Virginia , Tennessee , and Alabama , as to fairly ...
Stran 52
... reference to it . Of course a feature of this kind cannot always be successfully added , like a patch , to a battery not duly proportioned for it . 5. Of the three factors of the efficiency of the 52 TRANSACTIONS OF THE.
... reference to it . Of course a feature of this kind cannot always be successfully added , like a patch , to a battery not duly proportioned for it . 5. Of the three factors of the efficiency of the 52 TRANSACTIONS OF THE.
Stran 59
... course , wish each ques- tion to be answered as fully as possible , but we do not expect every one to answer them all . One question well answered would be of more use to us than the whole paper filled with answers , many of up which ...
... course , wish each ques- tion to be answered as fully as possible , but we do not expect every one to answer them all . One question well answered would be of more use to us than the whole paper filled with answers , many of up which ...
Stran 62
... course , we may happen to strike first the part of the basin where there is but a single seam , and in this case the bed would appear to divide into two or more branches within a short distance . Such cases are not rare in the ...
... course , we may happen to strike first the part of the basin where there is but a single seam , and in this case the bed would appear to divide into two or more branches within a short distance . Such cases are not rare in the ...
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Druge izdaje - Prikaži vse
Pogosti izrazi in povedi
American amount anthracite average basin beds Bessemer blast furnace block coal bottom bushels carbonic acid cent charcoal charge chemical clay coal-beds coke combustion containing contour lines copper cost cubic Cupellation deposits depth diameter drilling Eureka fact feet fuel fusion galena gangue gases gold gray gray iron groove ground hammer hearth heat holes hot blast Huronian inches increased ingots INSTITUTE OF MINING labor latter lead less lignites lime limestone long-wall loss magnetite matte metal method mineral MINING ENGINEERS Mountain necessary Norian oxide oxygen pass PECHIN phosphorus pig-iron pillars portion pounds present pressure produced Prof pyrites quantity quartz rails reduced roasting rocks roof sandstone seam shaft silica silicic acid silicon silver slag slate slope smelting steel strata sulphur surface temperature thickness three-high mill timber tion tons tuyeres veins weight white iron Wilkes-Barre
Priljubljeni odlomki
Stran 33 - Idaho is another lino of silver mines, mineralized with complicated association of the base metals, and more often occurring in older rocks. Through New Mexico, Utah, and Western Montana lies another zone of argentiferous galena lodes. To the east, again, the New Mexico, Colorado, Wyoming, and Montana gold belt is an extremely well-defined and continuous chain of deposits.
Stran xx - Rules may be amended at any annual meeting by a two-thirds vote of the members present ; Provided, that written notice of the proposed amendment shall have been given at a previous meeting ; am!
Stran xviii - Vice-Presidents for two years, and the Managers for three years ; and no VicePresident or Manager shall be eligible for immediate re-election to the same office at the expiration of the term for which he was elected. At each annual meeting a President, three Vice-Presidents, three Managers, a Secretary, and a Treasurer shall be elected, and the term of office shall continue until the adjournment of the meeting at which their successors are elected.
Stran xviii - 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.
Stran 419 - ... power which this peroxide has of oxidizing and consuming these same organic matters, which are thereby finally converted into carbonic acid and water. This last action, let me say in passing, is illustrated by the destructive action of rusting iron bolts on moist wood, and the effect of iron stains in impairing the strength of linen fibre. We see in the coal formation that the vegetable matter necessary for the production of the iron-ore beds was not wanting ; but the question has been asked...
Stran xix - All vacancies shall be filled by the appointment of the Council, and any person so appointed shall hold office for the remainder of the term for which his predecessor was elected...
Stran xvii - To promote the arts and sciences connected with the economic production of the useful minerals and metals, and the welfare of those employed in these industries...
Stran xix - Scrutineers, appointed at the annual meeting by the presiding officer ; and the persons who shall have received the greatest number of votes for the several offices, shall be declared elected, and the Scrutineers shall so report to the presiding officer.
Stran 109 - It is well known to every metallurgist that whenever the foundation is laid for a " sow " it is extremely difficult to prevent its rapid growth ; and even if the larger parts are broken or chiseled out at every tapping the iron will continually gain on the smelter. By the employment of the automatic tap the first formation of "sows
Stran xviii - III. DUES. The dues of members and associates shall be ten' dollars, payable upon election, and ten dollars per annum, payable in advance at the annual meeting ; Provided, that persons elected at the February meeting shall not be liable to dues at the first annual meeting following ; and members and associates permanently residing in foreign countries shall...