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" holes," or "kirves," with a man and boy as attendants, and completes the work with once going over, at the rate of fifteen yards per hour, and at any angle and height from floor rails, being suitable for either "dip" or "rise" workings, and is capable... "
House Documents, Otherwise Publ. as Executive Documents: 13th Congress, 2d ... - Էջ 572
United States. Congress. House - 1870
Ամբողջությամբ դիտվող - Այս գրքի մասին

The Annual of Scientific Discovery, Or, Year-book of Facts in ..., Հատոր 17

1867 - 400 էջ
...worked by hand-labor. The machine undercuts its " holes," or "kirves," with one man and one boy as attendants, and completes the work, with once going over, at the rate of fifteen yards per hour. Each machine uses thirty gallons of water per minute, at about three hundred pounds pressure, according...
Ամբողջությամբ դիտվող - Այս գրքի մասին

The Annual of Scientific Discovery, Or, Year-book of Facts in Science and Art

1867 - 400 էջ
...worked by hand-labor. The machine undercuts its " holes," or "kirves," with one man and one boy as attendants, and completes the work, with once going over, at the rate of fifteen yards per hour. Each machine uses thirty gallons of water per minute, at about three hundred pounds pressure, according...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Ures̓ Dictionary of Arts, Manufactures and Mines: Containing a ..., Հատոր 3

Andrew Ure - 1867 - 1144 էջ
...mineral at once poing over, at the rate of thirteen yards per hour, and at any height from floor or rails, being suitable for either " dip " or " rise " workings, and is capable of working the thinnest seams. This apparatus is actuated by the pressure of water, which can be obtained...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Statistics of Mines and Mining in the States and Territories West ..., Հատոր 2

Rossiter Worthington Raymond - 1870 - 834 էջ
...the ordinary rails, about the mine, The machine undercuts "holes," or "kirves," with a man and boy as attendants, and completes the work with once going...can be obtained either from the stand pipes in the pit*, or from pumps attached to any existing engine, or from an engine and pumps specially made for...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Notices of Mining Machinery and Various Mechanical Appliances in Use Chiefly ...

William Phipps Blake - 1871 - 260 էջ
...ordinary rails, about the mine, The machine undercuts u holes,77 or "kirves,77 with a man and boy as attendants, and completes the work with once going...from floor rails, being suitable for either "dip" or "rise77 workings, and is capable of cutting the thinnest seams. The pressure of water which actuates...
Ամբողջությամբ դիտվող - Այս գրքի մասին

A descriptive treatise on mining machinery, tools, and ..., Հատոր 1,Հատոր 96

George Guillinane André - 1877 - 280 էջ
...place, on the ordinary rails, about the mine. It undercuts " holes," or " kirves," with a man and boy as attendants, and completes the work with once going over, at the rate of 15 yards per hour, and at any angle and height from floor rails, being suitable for either " dip "...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Journal of the Franklin Institute

Franklin Institute (Philadelphia, Pa.) - 1866 - 544 էջ
...hand labor in the usual manner. The machine undercuts "holes," or " kirves," with a man and boy as attendants, and completes the work with once going...yards per hour, and at any angle and height from floor or rails, being suitable for either "dip" or "rise" workings, and is capable of cutting the thinnest...
Ամբողջությամբ դիտվող - Այս գրքի մասին




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