Proceedings of the Lake Superior Mining Institute ... Annual Meeting, Volúmenes11-14;Volúmenes1905-1909 |
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Página 28
... pounds pressure , 260 degrees F. H. to open the pores , after which a vacuum of 22 inches is drawn for one hour to free the pores of sap . The four per cent . solution of chloride of zinc is then allowed to flow from the solution tub ...
... pounds pressure , 260 degrees F. H. to open the pores , after which a vacuum of 22 inches is drawn for one hour to free the pores of sap . The four per cent . solution of chloride of zinc is then allowed to flow from the solution tub ...
Página 30
... pounds is maintained . The blowing engine compounds the steam , but the high and low pressure cylinders operate ... pounds or about 44 bushels of charcoal , eight gallons of wood tar , four and one - fourth gallons of wood alcohol , 208 ...
... pounds is maintained . The blowing engine compounds the steam , but the high and low pressure cylinders operate ... pounds or about 44 bushels of charcoal , eight gallons of wood tar , four and one - fourth gallons of wood alcohol , 208 ...
Página 50
... pounds for rail and merchant mills , to 50,000 pounds and sometimes a great deal more for large plate mills . From definite tests we know that the great number of hoisting engines non - condensing consume at least 80 to 100 pounds per ...
... pounds for rail and merchant mills , to 50,000 pounds and sometimes a great deal more for large plate mills . From definite tests we know that the great number of hoisting engines non - condensing consume at least 80 to 100 pounds per ...
Página 53
... pounds of steam contain at atmospheric pressure 966 B. T. U. per pound . Whence the accumulator must be figured to be capable of giving up P x 966 = N. B. T. U. within the allowable limits of variation of pressure . Calling Z the ...
... pounds of steam contain at atmospheric pressure 966 B. T. U. per pound . Whence the accumulator must be figured to be capable of giving up P x 966 = N. B. T. U. within the allowable limits of variation of pressure . Calling Z the ...
Página 54
... pounds , or about 1.5 tons . 1.5 0.11 For cast - iron , a weight of = 13.75 tons , is required . MIXED REGENERATOR WITH C. I. TRAYS CONTAINING WATER . This type of accumulator has been in use at the Bruay , mines , in the Pas de Calais ...
... pounds , or about 1.5 tons . 1.5 0.11 For cast - iron , a weight of = 13.75 tons , is required . MIXED REGENERATOR WITH C. I. TRAYS CONTAINING WATER . This type of accumulator has been in use at the Bruay , mines , in the Pas de Calais ...
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Allouez amygdaloid beaker boil boiler calcium Calumet & Hecla carbonate CHARLES Chicago Cleveland coal conglomerate copper country Crystal Falls cylinder deposits depth DETERMINATION dilute dissolved district drill Duluth electric engine epidote Escanaba evaporate F. W. Denton feet filter flask GEORGE grams greenstone Hancock heat Hibbing hoisting Houghton hydrate hydrochloric acid Ills Institute Iron Mountain Iron River Ironwood Ishpeming JAMES JOHN Kearsarge Keweenaw Lake Superior Lake Superior Mining lode Marquette Menominee Mesabi Mesabi range method Michigan mill Milwaukee mineral mining companies Minn molybdic Negaunee nitric acid Oliver Iron Mining operated oxide Painesdale paper permanganate phosphorus plant potassium pounds precipitate pressure pump rock salt sample shaft silica sodium solution stannous chloride steam steel sulphate superintendent surface THOMAS timber tion titrate tons Total solids trough turbine UNIV Vermilion Ranges Vulcan wash weigh William Kelly York City
Pasajes populares
Página 96 - Dissolve the residue in a little water to which a few drops of hydrochloric acid have been added.
Página 188 - The term of office shall continue until the adjournment of the meeting at which their successors are elected. Vacancies in the Council, whether by death, resignation, or the failure for one year to attend the Council meetings, or to perform the duties of the office, shall be filled by the appointment of the Council, and any person so appointed shall hold office for the...
Página xi - Institute are to promote the arts and sciences connected with the economical production of the useful minerals and metals in the Lake Superior region, and the welfare of those employed in these industries, by means of meetings for social intercourse, by excursions, and by the reading and discussion of practical and professional papers, and to circulate, by means of publications among its members the information thus obtained.
Página vi - The duties of all Officers shall be such as usually pertain to their offices, or may be delegated to them by the Council.
Página 117 - ... bells, ready to shoot in the shaft. (See rule 3.) Engineer's signal, that he is ready to hoist, is to raise the bucket or cage two feet and lower it again. (See Rule 3.) Levels shall be designated and inserted in notice hereinafter mentioned.
Página 118 - Miners must then give the signal of " men to be hoisted," then "spit fuse," get into the bucket, and give the signal to hoist. Rule 4. All timbers, tools, etc., "longer than the depth of the bucket," to be hoisted or lowered, must be securely lashed at the upper end to the cable.
Página xii - 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.
Página 119 - Rule 2 — No person must get off or on the bucket or cage, while the same is in motion. When men are to be hoisted give the signal for men. Men must then get on bucket or cage, then give the signal to hoist.
Página 119 - California, shall be responsible for accidents that may happen to men disobeying the above rules and signals. Said notice and rules shall be signed by the person or superintendent having charge of the mine, who shall designate the name of the corporation or the owner of the mine.
Página 117 - For the purpose of enforcing and properly understanding the above code of signals, the following rules are hereby established: RULE 1. In giving signals make strokes on bell at regular intervals. The bar ( ) must take the same time as for one stroke of the bell, and no more. If timber, tools, the foreman, bucket, or cage are wanted to stop at any level in the mine, signal, by number of strokes on the bell, the number of the level first before giving the signal for timber, tools, etc. Time between...