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" ... so that an observer has only to record the position of the several indices, at the first observation (by writing the lowest of the two figures on the respective circles between which the index points in their proper order), and deduct the amount from... "
A Conversation on Mines, Etc. Between a Father and Son: To which are Added ... - Page 185
by William Hopton - 1875 - 267 pages
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Spons' dictionary of engineering, ed. by O. Byrne (and Spon). 8 div, Volume 80

Spon E. & F.N., ltd - 1869 - 434 pages
...between which the index points, in their j>ro|KT order), and deduct the amount from their position at the second observation, to ascertain the velocity of the...area in feet of the passage where the instrument is plated, will show the number of cubic feet which lias passed during the same period. To ascertain the...
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Appleton's Dictionary of Machines, Mechanics, Engine-work, and ..., Volume 1

Engineering - 1873 - 1078 pages
...of the several indices at the first ob•Mration, and deduct the amount from their >'-it!"ii at the second observation, to ascertain the velocity of the...which has passed during the interval ; this multiplied into the area in feet of the passage where the instrument is placed, will show the number of cubic...
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Spons' Dictionary of Engineering, Civil, Mechanical, Military, and ..., Volume 1

Edward Spon, Oliver Byrne, Ernest Spon, Francis N. Spon - Engineering - 1874 - 396 pages
...between which the index points, in their proper order), and deduct the amount from their position at the second observation, to ascertain the velocity of the...of the passage where the instrument is placed, will shew the number of cubic feet which has passed during the same period. To ascertain the rate at which...
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Catalogue of the Special Loan Collection of Scientific Apparatus at the ...

South Kensington Museum - Scientific apparatus and instruments - 1876 - 534 pages
...registers 10 x 10 or 100 ft. ; the C index in the same way 1,000 ft. ; and so on up to 10,000,000 ft. ; so that an observer has only to record the position...is placed, will show the number of cubic feet which has passed during the same period. 414. Edelinann's Anemometer with galvanic register. M. Th. Edelmann,...
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Catalogue of the Special Loan Collection of Scientific Apparatus at the ...

Scientific apparatus and instruments - 1876 - 957 pages
...writing the lowest of the two figures on the respective circles between which the index points in (heir proper order), and deduct the amount from their position...of the passage where the instrument is placed, will "how the number of cubic feet which has passed during the same period. The novelty in this anemometer...
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Conversation on mines, &c., between a father and son; to which are added ...

William Hopton - 1883 - 316 pages
...between which the index points in their proper order), and deduct the amount from their position at his second observation, to ascertain the velocity of the...Mr. Casartelli, of Manchester, and are made by him. Casartelli's improved Biram's Anemometer. Son : Suppose I fix the anemometer further in the air-gate,...
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A Manual of the Principal Instruments Used in American Engineering and Surveying

W. & L.E. Gurley - Surveying - 1905 - 462 pages
...between which the index points, in their proper order), and deduct the amount from their position at the second observation, to ascertain the velocity of the air which has passed in the interval. This multiplied by the area in feet of the passage, where the instrument is placed...
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The Colliery Manager's Handbook: A Comprehensive Treatise on the Laying-out ...

Caleb Pamely - Coal mines and mining - 1898 - 1000 pages
...the index points, and to deduct the amount from their position at the second observation, in order to ascertain the velocity of the air which has passed during the interval. The velocity of the wind in feet per minute divided by 88 will give the velocity ? = 88. To find the...
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A Manual of the Principle Instruments Used in American Engineering and ...

W. & L.E. Gurley - Surveying - 1908 - 484 pages
...between which the index points, in their proper order, and deduct the amount from their position at the second observation, to ascertain the velocity of the air which has passed in the interval. This, multiplied by the area in feet of the passage where the instrument is placed,...
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