| Frederick Walter Simms - 1834 - 124 pages
...during an entire revolution of the telescope. The usual method of making this adjustment is as follows : **First, make the centre of the horizontal wire coincide...Y's till the level lies above it, and observe if the** same point is again cut by the centre of the wire ; if not, move the wire one half the quantity of... | |
| sir J Butler Williams - 1846 - 368 pages
...vertically. This adjustment is effected as follows: — Make the intersection of the cross wires to **coincide with some well-defined part of a distant...half round in its Y's, till the level lies above it** ; if the same point be not then covered by the centre of the wires, move this centre one-half of the... | |
| Basil Jackson - 1847 - 412 pages
...the theodolite on its legs, and direct the telescope so that the centre of the horizontal hair shall **coincide with some well-defined part of a distant object ; then turn the telescope** in the Ys till the level is uppermost : observe then whether the horizontal hair still coincides with... | |
| Benjamin Pike - 1848 - 356 pages
...during an entire revolution of the telescope. The usual method of making this adjustment is as follows : **First, make the centre of the horizontal wire coincide...Y's till the level lies above it, and observe if the** same point is again cut by the centre of the wire ; if not, move the wire one half the quantity of... | |
| Benjamin Pike (Jr.) - 1848 - 484 pages
...during an entire revolution of the telescope. The usual method of making this adjustment is as follows : **First, make the centre of the horizontal wire coincide...Y's till the level lies above it, and observe if the** same point is again cut by the centre of the wire ; if not, move the wire one half the quantity of... | |
| Ralph Smyth, Sir Henry Edward Landor Thuillier - 1851 - 828 pages
...adjustment is as follows : First, make the centre of the horizontal wire coincide with some well defined **part of a distant object ; then turn the telescope...Y's till the level lies above it, and observe if the** same point is again cut by the centre of the wire ; if not, move the wire one-half the quantity of... | |
| W. Davis Haskoll - 1858 - 324 pages
...question. To adjust the line of collimation. " First make the intersection of the horizontal wires **coincide with some well-defined part of a distant object, then turn the telescope half round in its** ' y-»- till the level lies above it, and observe if the same point is again cut by the centre of the... | |
| William Davis Haskoll - 1868 - 248 pages
...and also of the cross hairs of the diaphragm. We may now see about the actual line of collimation. **First, make the centre of the horizontal wire coincide with some well-defined** and motionless point in a distant object ; then turn the telescope half round in its Y'S, till the... | |
| William Davis Haskoll - 1886 - 354 pages
...and also of the cross hairs of the diaphragm. We may now see about the actual line of collimation. **First, make the centre of the horizontal wire coincide with some well.defined** and motionless point in a distant object ; then turn the telescope half round in its Y'S, till the... | |
| |