A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
187 to 206 of 227 glossary terms
string gnomon: the part of a sundial which casts the shadow, where this part is in the form of a taut string.
sun and moon dial: sundial that can also tell the time from the shadow cast by the moon, see article on the sundial.
sundial: instrument of many different forms for finding the time from the position of the sun, usually by measuring the position of a shadow, see article on the sundial.
sundial and dividers: a compound instrument combining the functions of both a sundial and dividers.
surveying and gunnery instrument: compound instrument combining functions required in the closely-associated fields of surveying and gunnery, such as measuring bearings and finding ranges.
surveying compass: magnetic compass with fixed sights used for measuring horizontal bearings by magnetic azimuth. See also circumferentor.
surveyor's cross: instrument for establishing right-angled lines of sight, by means either of open sights set at the ends of an equal-arm cross or slits in a cylinder.
surveyor's line: a long string or rope used to measure distances for surveying.
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.
triangulation: surveying technique involving the measurement of a baseline, the location of other stations by taking angles from either end, and perhaps the extension of the survey through the addition of further triangles.
triangulation instrument: instrument with three jointed arms with scales for surveying or range-finding, see article on the triangulation instrument.
