The American practical navigator : being an epitome of navigation and nautical astronomy (1888)
Bowditch, Nathaniel, 1773-1838, United States. Navy Dept. Bureau of Navigation, Cooper, Philip Henry, 1844-1912 · Washington : Govt. Print. Off. · leaf 130
ed by the numbers taken from that Table corresponding to the observed altitude. Since the amount of the refraction depends upon the density of the atmosphere, and the density varies withthe i)rtssure and the temperature, which are indicated by the barometer and ihermometer, the true refraction… … Fig. 62. 98 CORRECTION OF OBSERVED ALTITUDES. If the refraction be required for the apparent altitude 5°, when the thermometer is at 20° and the barometei-at 3oi».67— The mean refraction by Table 20 is, 9 52 The correction for height of barometer is, + 13The correction for the temperature, -(- 42…
Navigation · Nautical astronomy
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
