01 A level having a short telescope (hence its name) rigidly fixed to a table capable only of rotatory movement in a horizontal plane. The tel…
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A level having a short telescope (hence its name) rigidly fixed to a table capable only of rotatory movement in a horizontal plane. The telescope is usually an inverting one. It is sometimes called the Troughton level, from the name of the inventor, and a variety improved by one Gavatt is known as the Gavatt level.(Surv.) Also: <col>Troughton level</col>