 Allowance being made for refraction, the line of sights will indicate the true meridian ; the observation may now be made, and the flag-man put in position. When a due east and west line is to be run, the verniers of the horizontal limb are set at 90°,...  Elements of Surveying and Leveling - Page 8by Charles Davies - 1883 - 564 pagesFull view - About this book
 | Gurley, W. & L. E., Troy, N.Y. - Surveying - 1871 - 218 pages
...continuing the operation, it may be brought precisely between the equatorial lines. Allowance being now made for refraction, the line of sights will indicate...line is to be run, the verniers of the horizontal lirnb are set at 90°, and the sun's image kept between the lines as before. The Solar Compass being... | |
 | Aaron Schuyler - Navigation - 1873 - 536 pages
...equatorial lines, when the line of sights will indicate the true meridian. In running an east and west line, the verniers of the horizontal limb are set at 90°, and the sun's image kept between the equatorial lines. The needle is made to indicate zero on the arc of the compass box by turning the... | |
 | Gurley, W. & L. E., Troy, N.Y. - Surveying - 1878 - 284 pages
...continuing the operation, it may be brought precisely between the equatorial lines. Allowance being now made for refraction, the line of sights will indicate...and the flag-man put in position. When a due east ar d west line is to be run, the vernieri of the horizontal limb are set at 90°, and the sun's image... | |
 | Horatio Nelson Robinson - Navigation - 1878 - 564 pages
...continuing the operation, it may be brought precisely between the equatorial lines. Allowance being now made for refraction, the line of sights will indicate...may now be made, and the flag-man put in position. USE OF THE NEEDLE. In running lines, the magnetic needle is always kept with the sun ; that is, the... | |
 | Daniel Carhart - Surveying - 1888 - 536 pages
...continuing the operation, it may be brought precisely between the equatorial lines. Allowance being now made for refraction, the line of sights will indicate...run, the verniers of the horizontal limb are set at U0°, and the sun's image kept between the lines as before. The solar compass being so constructed... | |
 | Daniel Carhart - Surveying - 1893 - 528 pages
...continuing the operation, it may be brought precisely between the equatorial lines. Allowance being now made for refraction, the line of sights will indicate...may now be made, and the flag-man put in position. A\ r hen a due east and west line is to be run, the verniers of the horizontal limb are set at 90°,... | |
 | W. & L.E. Gurley - Surveying - 1905 - 462 pages
...line of sight will indicate the true meridian. and the observation may now be made and the flagman be put in position. When a due east and west line is...run, the verniers of the horizontal limb are set at ninety degrees, and the sun's image kept between the lines, as before. The Solar Compass being so constructed... | |
 | Gurley, W. & L. E., Troy, N.Y. - Surveying - 1895 - 490 pages
...of sights wtll indicate the true meridian, and the observation may now be made and the flag-man be put in position. When a due east and west line is...run, the verniers of the horizontal limb are set at ninety degrees, and the sun's image kept between the lines, as before. The Solar Compass being so constructed... | |
 | Francis Hodgman - Surveying - 1897 - 536 pages
...when by carefully continuing the operation, it may be brought precisely between the equatorial lines. When a due east and west line is to be run. the verniers...sun's image is in position the limb must be clamped atO in order to run a true meridian line, it will be evident that the bearing of any line from the... | |
 | W. & L.E. Gurley - Surveying - 1908 - 484 pages
...the equatorial lines. The line of sight will then indicate the true meridian, and the observation may be made and the flagman put in position. When a due...run, the verniers of the horizontal limb are set at ninety degrees, and the sun's image kept between the lines, as before. The Solar Compass being so constructed... | |
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