 | Frederick Walter Simms - 1834 - 124 pages
...making it a circumferentor. The whole is mounted on parallel plates and three legs, the same as the theodolite. It is evident, from the nature of this...the telescope round on its axis as it lies in the Y's, and observe whether the coincidence remains perfect during its revolution : if it does, the adjustment... | |
 | Frederick Walter Simms - 1844 - 178 pages
...circumferentor. The whole is mounted on parallel plates and three legs, the same as the theodolite. of. the cylindrical rings on which the telescope turns...the telescope round on its axis as it lies in the Y's, and observe whether the coincidence remains perfect during its revolution : if it does, the adjustment... | |
 | Frederick Walter Simms - 1844 - 190 pages
...that the level may preserve its position while the instrument is turned quite round upon the stand. To adjust the Line of Collimation. The eye-piece being...the telescope round on its axis as it lies in the Y's, and observe whether the coincidence remains perfect during its revolution : if it does, the adjustment... | |
 | Sir J. Butler Williams - 1846 - 368 pages
...in other words, either horizontally or vertically. This adjustment is effected as follows: — Make the intersection of the cross wires to coincide with some well-defined part of a distant object ; then turn the telescope half round in its Y's, till the level lies above it ; if... | |
 | Benjamin Pike - 1848 - 356 pages
...making it a circumferentor. The whole is mounted on parallel plates and three legs, the same as the theodolite. It is evident, from the nature of this...the telescope round on its axis as it lies in the Y's, and observe whether the coincidence remains perfect during its revolution; if it does, the adjustment... | |
 | Benjamin Pike (Jr.) - 1848 - 482 pages
...making it a circumferentor. The whole is mounted on parallel plates and three legs, the same as the theodolite. It is evident, from the nature of this...the telescope round on its axis as it lies in the Y's, and observe whether the coincidence remains perfect during its revolution; if it does, the adjustment... | |
 | P. O'Shaughnessy (Civil engineer) - 1848 - 110 pages
...object, and adjust it so that the cross- wires and object may be seen with perfect clearness : then bring the intersection of the cross- wires to coincide with some well-defined part of the object, then clamp the instrument firm, turn the telescope round in its (Y's) and if the bisection continue during... | |
 | Frederick Walter Simms - 1850 - 184 pages
...making it a circumferentor. The whole is mounted on parallel plates and three legs, the same as the theodolite. It is evident, from the nature of this...coincide with some well-defined part of the object, then torn the telescope round on its axis as it lies in the Y's, and observe whether the coincidence remains... | |
| |
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... 