An atlas of astronomy; a series of seventy-two plates, with introduction and index (1892)
Ball, Robert S. (Robert Stawell), Sir, 1840-1913 · New York, D. Appleton and company · leaf 54
d the margin, it is easy toread the position of a star, or to enter any desired object with all requisite accuracy. For thispurpose it will be found convenient to copy the scale in Declination, which is given on themargin of each map, on the edge of a sheet of paper. If, then, it is desired to… … -iO THE STAR MAPS. the R.A. of the object, and to put a dot on the map at the point of the scale coiresponding toits Declination. In the same way the position of any object entered on the map may be readoff. In the case of maps 51 and 70, the method of reading off positions is somewhat differentIn…
Stars · Astronomy
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