The*od"o*lite (?), n. [Probably a corruption
of the alidade. See Alidade.] An instrument used,
especially in trigonometrical surveying, for the accurate measurement of
horizontal angles, and also usually of vertical angles. It is variously
constructed.
&fist; The theodolite consists principally of a telescope, with cross
wires in the focus of its object glass, clamped in Y's attached to a frame
that is mounted so as to turn both on vertical and horizontal axes, the
former carrying a vernier plate on a horizontal graduated plate or circle
for azimuthal angles, and the latter a vertical graduated arc or semicircle
for altitudes. The whole is furnished with levels and adjusting screws and
mounted on a tripod.
The*od"o*lite (?), n. [Probably a corruption
of the alidade. See Alidade.] An instrument used,
especially in trigonometrical surveying, for the accurate measurement of
horizontal angles, and also usually of vertical angles. It is variously
constructed.
&fist; The theodolite consists principally of a telescope, with cross
wires in the focus of its object glass, clamped in Y's attached to a frame
that is mounted so as to turn both on vertical and horizontal axes, the
former carrying a vernier plate on a horizontal graduated plate or circle
for azimuthal angles, and the latter a vertical graduated arc or semicircle
for altitudes. The whole is furnished with levels and adjusting screws and
mounted on a tripod.
