 | Frederick Walter Simms - 1834 - 124 pages
...and bisect it with the middle of the central vertical wire; then lift the telescope very carefully out of its angular bearings, or Y's, and replace it...adjustment is correct; if not, move the wires one half the error, by turning the small screws which hold the diaphragm near the eye-end of the telescope, and... | |
 | Frederick Walter Simms - 1844 - 248 pages
...bisect it with the central intersection of the cross wires ; then lift the telescope very carefully out of its angular bearings, or Y'S, and replace it...adjustment is correct; if not, move the wires one half of the error, by turning the small screws which hold the diaphragm with the cross wires near the eye-end... | |
 | Frederick Walter Simms - 1844 - 190 pages
...and bisect it with the middle of the central vertical wire ; then lift the telescope very carefully, out of its angular bearings, or Y's, and replace it...collimation adjustment is correct; if not, move the wires one-half the error, by turning the small screws which hold the diaphragm near the eye-end of the telescope,... | |
 | Frederick Walter Simms - 1844 - 178 pages
...and bisect it with the middle of the central vertical wire ; then lift the telescope very carefully out of its angular bearings, or Y's, and replace it...the telescope again to the same object, and if it u" still bisected, the collimation adjustment is correct ; if not, the wires one half the error, by... | |
 | Nathaniel Bowditch - 1846 - 854 pages
...central wire ; then lift the telescope very carefully out of its angular bearings or Y's, and replaee it with the axis reversed ; point the telescope again to the same object, and, if it be stiH bisected, the collimation adjustment is correct ; if not, move the wires one half the error, by... | |
 | Benjamin Pike - 1848 - 356 pages
...and bisect it with the middle of the central vertical wire ; then lift the telescope very carefully out of its angular bearings, or Y's, and replace it...adjustment is correct ; if not, move the wires one half the error, by turning the small screws which hold the diaphragm near the eye-end of the telescope, and... | |
 | Benjamin Pike (Jr.) - 1848 - 482 pages
...and bisect it with the middle of the central vertical wire ; then lift the telescope very carefully out of its angular bearings, or Y's, and replace it...adjustment is correct ; if not, move the wires one half the error, by turning the small screws which hold the diaphragm near the eye-end of the telescope, and... | |
 | Elias Loomis - 1855 - 510 pages
...bisect it with the middle vertical wire. Then lift the telescope very carefully from its supports, and replace it with the axis reversed. Point the telescope...adjustment is correct ; if not, move the wires one half the error by turning the small screws which hold the diaphragm, near the eye end of the telescope. But... | |
 | 1880 - 880 pages
...better), and bisect il with the middle of the central wire ; then lift the telescope very carefully out of its angular bearings or Y's, and replace it...adjustment is correct; if not, move the wires one half the error, by turning the small screws which hold the diaphragm near the eye-end of the telescope, and... | |
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Y's, and replace it with the axis reversed ; point the telescope again to the same object, and if it be still bisected, the collimation adjustment is correct; if not, move the wires one half the error, by turning the small screws which hold the diaphragm... 