 | George Adams - 1813 - 576 pagina’s
...are necessary. 1. To place the intersection of the wires in the telescope, so that it shall coincide with the axis of the cylindrical rings on which the telescope turns. 2. To render the level parallel to this axis. 3. To adjust for the horizontal motion quite round upon... | |
 | Frederick Walter Simms - 1834 - 134 pagina’s
...is that of the line of collimation ; that is, to make the intersection of the cross wires coincide with the axis of the cylindrical rings on which the telescope turns : it is known to be correct, when an eye looking through the telescope observes their intersection... | |
 | Thomas Holliday - 1838 - 404 pagina’s
...instrument is properly adjusted, the intersection of the cross wires in the telescope will coincide exactly with the axis of the cylindrical rings on which the telescope turns, and the level will be parallel to this axis, also the telescope will be perpendicular to the vertical... | |
 | Basil Jackson - 1841 - 426 pagina’s
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 | William Galbraith - 1842 - 216 pagina’s
...instrument. Adjustments. 1. The first adjustment is to make the intersection of the cross-wires coincide with the axis of the cylindrical rings on which the telescope turns, called rectifying the line of collimation. This is known to be correct when the eye, looking through... | |
 | Basil Jackson - 1847 - 410 pagina’s
...necessary. First, to place the intersection of the wires in the telescope, so that it shall coincide with the axis of the cylindrical rings, on which the telescope turns; secondly, to render the level parallel to this axis; and lastly, to set the telescope perpendicular... | |
 | Benjamin Pike - 1848 - 356 pagina’s
...necessary. First, to place the intersection of the wires in the telescope, so that it shall coincide with the axis of the cylindrical rings on which the telescope turns ; secondly, to render the level parallel to this axis ; and lastly, to set the telescope perpendicular... | |
 | Benjamin Pike (Jr.) - 1848 - 482 pagina’s
...necessary. First, to place the intersection of the wires in the telescope, so that it shall coincide with the axis of the cylindrical rings on which the telescope turns ; secondly, to render the level parallel to this axis ; and lastly, to set the telescope perpendicular... | |
 | John Ainslie - 1849 - 586 pagina’s
...instrument. ADJUSTMENTS. 1. The first adjustment is to make the intersection of the crosswires coincide with the axis of the cylindrical rings on which the telescope turns, called rectifying the line of collimation. This is known to be correct when the eye, looking through... | |
 | Sir Henry Edward Landor Thuillier - 1851 - 826 pagina’s
...adjustment is that of the line of collimation; that is, to make the intersection of the cross wires coincide with the axis of the cylindrical rings on which the telescope turns : it is known to be correct, when an eye, looking through the telescope, observes their intersection... | |
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The whole is mounted on parallel plates and three legs, the same as the theodolite. It is evident, from the nature of this instrument, that three adjustments are necessary. First, to place the intersection of the wires in the telescope, so that it shall... 