 | Horatio Nelson Robinson - Navigation - 1878 - 564 pages
...the verniers of the horizontal limb. Then remove the clamp screw, and raise the latitude arc until the polar axis is, by estimation, very nearly horizontal,...and direct the equatorial sights to some distant and well marked object, and observe the same through the compass sights. If the same object is seen through... | |
 | Gurley, W. & L. E., Troy, N.Y. - Surveying - 1878 - 284 pages
...by the verniers and horizontal limb. Then remove the clamp screw, and raise the latitude arc until the polar axis is by estimation very nearly horizontal,...vernier of the declination arc at zero, and direct Ihe equatorial sights to some distant and well marked object, and observe the same through the compass... | |
 | Charles Davies - Surveying - 1883 - 614 pages
...polar axis i? l>y estimation very nearly horizontal, and if necessary, tighten the screws on tli-1 pivots of the arc, so as to retain it in this position....well-marked object, and observe the same through the compass eights. If the same object is seen through both, and the verniers read to 90° on the limb, the adjustment... | |
 | Charles Fitzroy Bellows, Francis Hodgman - Surveying - 1886 - 490 pages
...by the verniers and horizontal limb. Then remove the clamp-screw, and raise the latitude arc until the polar axis is by estimation very nearly horizontal,...and direct the equatorial sights to some distant and well marked object, and observe the same through the compass sights. If the same object is seen through... | |
 | Francis Hodgman, Charles Fitzroy Bellows - Surveying - 1891 - 520 pages
...limb. Then remove the clamp-screw and raise the latitude arc until the polar axis is by estimat ion very nearly horizontal, and if necessary, tighten...and direct the equatorial sights to some distant and well marked object, and observe the same through the compass sights. If the same object is seen through... | |
 | Gurley, W. & L.E., Troy, N.Y. - Surveying - 1893 - 390 pages
...limb. Then remove the clamp. screw, and raise the latitude arc until the polar axis is by est1mation very nearly horizontal, and if necessary, tighten...and direct the equatorial sights to some distant and well marked object, and observe the same through the compass sights. If the same object is seen through... | |
 | W. & L.E. Gurley - Surveying - 1905 - 462 pages
...verniers and horizontal limb. Then remove the clamp and tangent screws, and raise the latitude arc until the polar axis is by estimation very nearly horizontal,...vernier of the declination arc at zero, and direct the outside edges of the lens blocks to some distant and well-marked object, and observe the same through... | |
 | Gurley, W. & L. E., Troy, N.Y. - Surveying - 1903 - 460 pages
...position. Fix the vernier of the declination arc at zero, and direct the outside edges of the lens blocks to some distant and well-marked object, and observe...through the compass sights. If the same object is seen by both observations, and the verniers read to ninety degrees on the limb, the adjustment is complete... | |
 | W. & L.E. Gurley - Surveying - 1908 - 484 pages
...and horizontal limb. Remove the clamp and tangent screws of the latitude arc, and raise the arc until the polar axis is by estimation very nearly horizontal,...tighten the screws on the pivots of the arc, so as to hold it in this position. Fix the vernier of the declination arc at zero, and direct the outside edges... | |
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Then remove the clamp-screw, and raise the latitude arc until the polar axis is by estimation very nearly horizontal, and if. necessary, tighten the screws on the pivots of the arc, so as to retain it in this position. Fix the vernier of the declination... 