 | George Farrer Rodwell - 1871 - 620 страница
...Paris. The length of a metre in English inches is 393707898, or nearly a quarter of an inch more than the length of a pendulum vibrating seconds in the latitude of London. The French unit of surface is the are of loo square metres. The unit of capacity is the litre, the... | |
 | Richard Anthony Proctor - 1871 - 358 страница
...inch, of that substance. But what is an inch ? It is determined, we find, as a certain fraction of the length of a pendulum vibrating seconds in the latitude of London. A second, we know, is a certain portion of a mean solar day, and is practically determined by a reference... | |
 | John Yeats - 1871 - 514 страница
...instances, the most accurate scientific measurements with the best instruments were absolutely necessary. The length of a pendulum vibrating seconds in the latitude of London was found by Captain Kater to be 39-13929, when oscillating in vacua, at the temperature of 62° Fahr.,... | |
 | Edward Spon - 1872 - 404 страница
...taking the equation »2.a = d, 3-Ш592 = т2 = 9'8696, 9-8696 a = d. It has been found by experiment that the length of a pendulum vibrating seconds in the latitude of London = 39' 125. The length of the cycloidal pendulum is equal to twice tho diameter of the generating circle,... | |
 | Barnard Smith - 1873 - 366 страница
...divided, computed, and ascertained ; and that the thirty-sixth part of this yard shall be an Inch, Now the length of a Pendulum vibrating seconds in the latitude of London, in a vacuum, and at the level of the sea, is found to be 39-1393 such inches, ie 39 such inches and... | |
 | Richard Anthony Proctor - 1873 - 340 страница
...cubic inch, of that substance. But what is an inch? It is determined, we find, as a certain fraction of the length of a pendulum vibrating seconds in the latitude of London. A second, we know, is a certain portion of a mean solar day, and is practically determined by a reference... | |
 | Edward Spon, Oliver Byrne, Ernest Spon, Francis N. Spon - 1874 - 396 страница
...taking the equation IT*, a = d, 3'H159J = ir2 = 9-8696, Э-8690 a = d. It has been found by experiment that the length of a pendulum vibrating seconds in the latitude of London = 39-125. The length of the cycloidal pendulum is equal to twice tho diameter of the generating circle,... | |
 | Robert Potts - 1876 - 389 страница
...invariable natural standard, they reported that it appears from the experiments made for determining the length of a pendulum vibrating seconds in the latitude of London in a vacuum, and reduced to the level of the sea, that the distance from the axis of suspension to... | |
 | 1879 - 980 страница
...inches, or parts of a cubic inch, of that substance. An inch is determined as a certain fraction of the length of a pendulum vibrating seconds in the latitude of London. A second is a certain portion of a mean solar day, and is practically determined by a reference to... | |
 | David Ames Wells - 1879 - 552 страница
...enacted that, if the standard yard be injured or destroyed, it should be restored by a comparison with the length of a pendulum vibrating seconds in the latitude of London [§99i; and this measurement was computed at 39.i393 inches. In i834 the Parliament house was burned,... | |
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It is determined, we find, as a certain fraction of the length of a pendulum vibrating seconds in the latitude of London. 
