 | 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 - 410 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 - 482 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 Henry Edward Landor Thuillier - 1851 - 826 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 - 422 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 - 252 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... | |
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