AstronomyDetermination of time, longitude, latitude, and azimuth . r to the horizontal axis. If the instrument is a meridian telescope,or of the form shown in illustration No. 13, this adjustment may be made as for a transit (p. 15)by reversing the horizontal axis in the wyes. If the instrument is of the form in which thetelescope is to one side of the vertical axis, the method of making the test must be modifiedaccordingly. It may be made by using two collimating telescopes which are pointed uponone another in such positions that the zenith telescope may be pointed first upon one and thenupon
AstronomyDetermination of time, longitude, latitude, and azimuth . r to the horizontal axis. If the instrument is a meridian telescope,or of the form shown in illustration No. 13, this adjustment may be made as for a transit (p. 15)by reversing the horizontal axis in the wyes. If the instrument is of the form in which thetelescope is to one side of the vertical axis, the method of making the test must be modifiedaccordingly. It may be made by using two collimating telescopes which are pointed uponone another in such positions that the zenith telescope may be pointed first upon one and thenupon the other with no intermediate motion except a rotation of 180° about the horizontalaxis. It may be made as for an engineers transit, but using two fore and two back points,the distance apart of each pair of points being made double the distance between the verticalaxis and the axis of collimation of the telescope. A single pair of points at that distance apartmay be used and the horizintal circle trusted to determine when the instrument has been turned No. ill Ill X ?1 > \\ I! a
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Keywords: ., bookauthoruscoasta, bookcentury1900, bookdecade1910, bookyear1913
