## A treatise on trigonometry, plane and spherical: with its application to navigation and surveying, nautical and practical astronomy and geodesy, with logarithmic, trigonometrical, and nautical tables |

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### Common terms and phrases

altitude azimuth called centre circle colatitude collimation column computed correction corresponding Cosecant cosine Cotangent declination determined diagram diameter Diff difference of latitude difference of longitude Dist divided division equal equation error example expressed feet formula Geom given number Greenwich half hence horizontal Hour a.m. hour angle hypothenuse instrument intersection length limb logarithm means measured method middle latitude miles multiplied Nautical Almanac number of degrees object observed obtained p.m. Hour parallax parallel parallel sailing perpendicular plane sailing plane triangle pole Prop proportion quadrant radius refraction rhumb rhumb line right angled triangle right ascension rule sailing scale screw Secant semidiameter ship side opposite siderial sine sine and cosine solution spherical triangle spirit level star station subtracted supporting axis TABLE XXVII tangent telescope theodolite transit trigonometrical lines vernier vertical axis wires zenith distance