 | Industrial arts - 1852 - 450 pages
...circular movement independent of that of the graduated circle. The manner of measuring the angles is 83 follows : — Introduce the micrometer, turn the eye-piece...sudden shower, accompanied with strong wind from the south-east, to move in the space of a very few minutes a quarter of an inch to the eastward. Observations... | |
 | Industrial arts - 1852 - 460 pages
...micrometer are parallel with the other side of the angle to be measured, and, in regarding the circle, tho degrees of the angle passed through will be seen....sudden shower, accompanied with strong wind from the south-east, to move in the space of a very few minutes a quarter of an inch to the eastward. Observations... | |
 | American Association for the Advancement of Science - Science - 1852 - 514 pages
...centre of the graduated circle. A few hours later, it was found out of the centre. Upon observing more carefully, it was found during clear days that the...that on days when the sun was obscured by clouds, that no motion of the ball or its index point occurred. It was still further observed on one occasion,... | |
 | American Association for the Advancement of Science - 1852 - 514 pages
...centre of the graduated circle. A few hours later, it was found out of the centre. Upon observing more carefully, it was found during clear days that the...that on days when the sun was obscured by clouds, that no motion of the ball or its index point occurred. It was still further observed on one occasion,... | |
 | Geology - 1853 - 422 pages
...centre of the graduated circle. A few hours later, it was found out of the centre. Upon observing more carefully, it was found during clear days that the...that on days when the sun was obscured by clouds, that no motion of the ball or its index point occurred. It was still further observed on one occasion,... | |
 | John Timbs - Encyclopedias and dictionaries - 1857 - 444 pages
...pendulum in the shaft of Bunker Hill Monument, for the purpose of illustrating the experiment of Foncault, it was observed that the ball of the pendulum, when...east It was further observed that on days when the snn was obscured by clouds, no motion of the ball on its index-point occurred. It was still further... | |
 | David Ames Wells - Reference books - 1863 - 470 pages
...that the ball of the pendulum, when at rest, \vas not always over the same point in the floor. Tha careful consideration of all the conditions of this...sudden shower, accompanied with strong wind from the south-east, to move in the space of a very few minutes a quarter of an inch to the eastward. Observations... | |
 | American Association for the Advancement of Science - Science - 1862 - 530 pages
...centre of the graduated circle. A few hours later, it was found out of the centre. Upon observing more carefully, it was found during clear days that the...that on days when the sun was obscured by clouds, that no motion of the ball or its index point occurred. It was still further observed on one occasion,... | |
 | 1852 - 960 pages
...departure of the ball from the center commenced before 7 o'clock AM on a sunny day ; at this hour it was to the westward ; at noon to the northwest ; and at evening to the eastward. In the progress of the afternoon it had twice the amount of motion observed in the morning.... | |
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The careful consideration of all the conditions of this fact resulted in ascribing it to the unequal expansion of the sides of the monument, in consequence of unequal exposure to the sun. Upon observing carefully, it was found during clear days that the... 