A theodolite is a precision instrument for measuring angles in the horizontal and vertical planes. Theodolites are used mainly for surveying applications, and have been adapted for specialized purposes in fields like metrology and rocket launch technology.:
Astronomical compendium consisting of a box with three compartments. In the first, there is an astrolabe and a lunar calendar. Between the first and second compartment is an hour circle. The second compartment houses a sundial and a magnetic compass for orientation. The third compartment contains the Horae planetarum table and an horary quadrant with a shadow square. The markings are in German.