the_transit.doc - The Engineer's Transit A theodolite is...

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The Engineer's Transit A theodolite is any precise instrument designed to measure horizontal or vertical angles about a point. A transit is a theodolite with a telescope that can be reversed in direction with respect to the rest of the alidade by rotating it about its horizontal axis without removing it from its bearings. Three main parts of an engineer's transit are: 1. The Alidade . Composed of the telescope assembly attached to the telescope axis mounted on top of the standards, the vertical circle and vernier, plate bubbles, transit compass box, horizontal circle with two verniers A and B 18000' apart, horizontal plate attached to an inner spindle which rotates within the outer spindle, and other minor parts as
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