surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments n
2
A dioptric telescope, fitted with two tubes joining, so as to enable a person to view an object with both eyes at once
3
The telescope is raised or depressed in order to sight the objects or surfaces, and the differences in vertical height are thus shown on the graduated standard.
4
A reflecting telescope, part of which is made to rotate eccentrically, so as to produce a ringlike image of a star, instead of a point
5
n optical device used to follow the path of a celestial body and reflect its light into a telescope
