tightening the capstan-headed nuts of level tube

measurement of horizontal angles only

measurement of vertical angles only

measurement of both horizontal and vertical angles

transiting

reversing

plunging

swinging

the length of telescope

the diameter of vertical circle

the diameter of lower plate

the diameter of upper plate

to support the main part of the instrument

to attach the theodolite to the tripod

to provide a means for levelling the theodolite

none of the above

on its outer spindle with a relative motion between the vernier and graduated scale of lower plate

on its outer spindle without a relative motion between the vernier and graduated scale of lower plate

on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate

on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate