Hints to Travellers: Scientific and General, Volume 1

A B C accuracy accurately adjustment alidade aneroid approximate artificial horizon astronomical azimuth barometer bearing boiling-point celestial centre chronometer circle clamp computed Corr correct Cosine Parts Secant decl Declination diagram Diff difference of longitude equator Error of Watch Fahr fixed points given hour angle inches Index Error intersection interval Length in feet Log sec log sine Logarithm longitude magnetic magnetic bearing mean measured mercury meridian method Mètres Feet micrometer Nautical Almanac object observations obtained occultation ordinary Parallax parallel plane table plane-table position prismatic compass probable error rays reading refraction Right Ascension scale screw Secant Cotang sextant shown sidereal Sine Parts Cosec star station Statute Miles subtended Subtense Instrument subtract survey TABLE XXXVII.—(continued tacheometer taken Tangent Cosec Tangent Parts Cotang tangent-screw telescope temperature theodolite thermometer transit theodolite traveller traverse triangle vernier vertical angles wires zero ΙΟ