Theodolite

I drew outlines (according to my usual custom) of all the hills on the horizon before us, and took angles on them with the theodolite.

Source: wiktionary

The height of those mountains was from five to seven thousand feet above our level, by angular measurement with a theodolite.

Source: wiktionary

It was a lieutenant and a couple of privates of the 8th Hussars, with a stand like a theodolite, which the artilleryman told me was a heliograph.

Source: wiktionary

Germany, of all countries, was most vitally concerned in it; but even a cave-dweller in La Fayette Square, seeking only a measure of motion since the Crusades, saw before his eyes, in the spring of 1903, a survey of future order or anarchy that would exhaust the power of his telescopes and defy the accuracy of his theodolites.

Source: wiktionary