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| 200 to 204 of 227 glossary terms |
| surveyor's line: a long string or rope used to measure distances for surveying.
| surveyor's square: another name for a surveyor's cross.
| theodolite: surveying instrument for measuring horizontal angles, and perhaps vertical angles, see article on the theodolite.
| theodolite and sundial: an instrument combining the functions of a sundial and a theodolite.
| throne: part of an astrolabe, connecting the instrument to the suspension shackle, see article on the astrolabe.
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