Brocklesby, John, 1811-1889. [from old catalog] · New York, Sheldon and company · leaf 79
e is obtained, the horizontal parallax can be derived from it;the parallax varying as the sine of the zenith distances. This method is not exactenough for the sun, owing to his great distance. His true horizontal parallax isotherwise found, (Arts. 462-3,) and his distance is then computed by it.… … TRANSIT INSTRUMENT. Fig. 26, one horizontal and five vertical: the latter beingparallel to each other, and separated by equal intervals -1 FIG. 26.
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
