XV. To find the time at Greenwich corresponding to a given To take out a planet's right ascension and declination. XVII. Given mean solar time to find sidereal time. XXX. To find the latitude by moon's meridian altitude XXXIV. To find the latitude by sun's altitude near the meridian 136 XL. Ivory's Rule for finding the latitude by sun double XLI. To find the longitude from the above observations Greenwich mean time at some instant LIII. To find the longitude by star lunar (ship time deter- LV. To find longitude by sun lunar, altitudes calculated. 230 LVII. To find the variation of the compass, having given the true bearing and compass bearing and deviation |