Handbook for Gas Engineers and Manager: By Thomas Newbigging ...

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W. King, 1889 - 524 páginas
 

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Página 449 - An Act to repeal an Act of the present session of Parliament, intituled ' An Act for the more effectual Abolition of Oaths and Affirmations taken and made in various Departments of the State, and to substitute Declarations in lieu thereof, and for the more entire Suppression of voluntary and extra-judicial Oaths and Affidavits;' and to make other Provisions for the abolition of unnecessary Oaths.
Página 449 - An Act for the more effectual abolition of oaths and affirmations taken and made in various departments of the state, and to substitute declarations in lieu thereof; and for the more entire suppression of voluntary and extra-judicial oaths and affidavits ;" and to make other provisions for the abolition of unnecessary oaths.
Página 47 - The capacity of the plant, in horse power, is ten." 2. Do not abbreviate abstract or descriptive words. Example: "Horizontal return tubular boilers," not "HRT boilers." 3. Use lower case characters for abbreviations. An exception to this rule may be made in the case of words spelled normally with a capital. Example: "B. tu" and not "btu" nor "BTU" (British thermal unit.
Página 151 - The products both of the combustion of the gas and of the gradual volatilization of the ammonia salt go upwards through the trumpet-tube into a vertical glass cylinder, packed with balls of glass, to break up the current and promote condensation. From the top of the cylinder there Fig.
Página 153 - ... and a drop -of a solution of silver nitrate added ; should the liquid instead of remaining perfectly clear, become cloudy, the washing must be continued until, on repeating the test, no cloudiness is produced.) Dry the filter with its contents, and transfer it into a weighed platinum crucible. Heat the crucible over a lamp, increasing the temperature gradually, from the point at which the paper begins to char up to bright redness.* When no black particles remain allow the crucible to cool ; place...
Página 327 - The gas in the photometer is to be lighted at least fifteen minutes before the testings begin, and it is to be kept continuously burning from the beginning to the end of the tests. Each testing shall include ten observations of the photometer made at intervals of a minute. The consumption of the gas is to be carefully adjusted to five cubic feet per hour.
Página 146 - ... solution has become as dark as the standard. As the ascending bubbles interfere somewhat with the observation of the tint, it is best to turn off the tap when the colour seems almost deep enough ; compare the two ; turn on the tap, if necessary, for a few moments ; then compare again ; and so on, till the colour of the two liquids is the same. The volume of water which the measuring cylinder now contains is equal to the volume of gas which has passed through the lead solution.
Página 328 - Before and after making each set of ten observations of the photometer the gas examiner shall weigh the candles, and if the combustion shall have been more or less per candle than 120 grains per hour he shall make and record the calculations requisite to neutralise the effects of this difference.
Página 152 - See that the inlet-pipe fits gas-tight into the burner, and that the holes in the circular stand are clear. If the burner gives a luminous flame, remove the top piece, and, having hammered down gently the nozzle of soft metal, perforate it afresh, making as small a hole as will give passage to half a cubic foot of gas per hour at a convenient pressure.
Página 329 - The calculations for working out the corrections, &c., for the illuminating power of the gas proceed in the following manner : — Add the observations together, and divide the sum by 10 to get the average. Then, as two candles are used, multiply by 2, to get the illuminating power of the gas if tried against one candle. Then, as the standard rate of consumption of the candles — viz., 120 grains — is to the average number of grains consumed by each per hour, so is the above-obtained number to...

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