[Coffin, John Huntington Crane], 1815-1890. [from old catalog] · New York, D. Van Nostrand · leaf 72
seen from A in the direction A S ;and from C in the direction C S. The angle at S, subtendedby A C, is the difference of these directions, or the parallaxfor the two points of view, C and A. 54. In astronomicalobservations, the ob-server is on the surfaceof the earth ; the con-ventional point to… … 66 NAVIGATION. sider this geocentric parallax, which is the difference of thedirection of a body seen from the surface and from the cen-tre of the earth. It may also be defined to be the angleat the body subtended by that radius of the earth, whichpasses through the place of the observer. Thus, in…
Navigation · Nautical astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
