Circular of the Bureau of Standards, Edições 17-23U.S. Government Printing Office, 1910 |
Termos e frases comuns
accuracy Add to Observed alcohol and water Alcohol by Volume Alcohol by Weight alternating current ammeter amperes apparent weight Bureau of Standards cent alcohol Length centimeter CHIG circular conductors connected copper copper loss core loss corrections to readings deflection Degrees Baumé density determined direct current direct-current electrodynamometer electromotive force ethyl alcohol exceed flux frequency fuses galvanometer gausses graduation of hydrometers grams hydrometers to indicate hysteresis inclosed inspector instrument insulation iron Length Per cent machine magnetizing force material measurements metal MICHI milliliter mines motor normal induction Observed Per Cent operation person portable potentiometer ratio resistance RSITY Rule safety lamps scale secondary shunt SITY specific gravity specimen standard at 20 steel Subtract from Observed suitable switches TABLE temperature coefficient Tenths of Degrees test coil torque trailing cable transformers UNIV CHIG UNIV UNIV voltage voltmeter volts Volume at 60 volumetric wattmeter weight of water
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Página 22 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10" units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.
Página 23 - Ampere, which is one-tenth of the unit of current of the CGS system of electromagnetic units and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, in accordance with a certain specification, deposits silver at the rate of 0.001118 of a gramme per second.
Página 8 - Any person violating the provisions of this section shall be liable to a fine of not more than five hundred dollars nor less than one hundred dollars.
Página 30 - In any place or part of a mine where general rule No. 8 of the coal mines regulation act, 1887, applies...
Página 35 - If any electric sparking or arc be produced outside a coal-cutting or other portable motor or by the cables or rails, the machine shall be stopped, and not be worked again until the defect is repaired, and the occurrence shall be reported to an official of the mine.
Página 15 - ... the working face, until the machine man shall have made an inspection for gas in the place where the machine is to work, unless such examination is then made by some other competent person authorized or appointed for that purpose by the mine foreman. If any explosive gas is found in the place, the machine shall not be taken in.
Página 1 - ... miners, or one or more operators of mines, together with a bond in the sum of five hundred dollars, payable to the State, and signed by two or more responsible freeholders, and conditioned for the payment of all costs and expenses arising from the investigation of such charges...