A beginner's star-book; an easy guide to the stars and to the astronomical uses of the opera-glass, the field-glass and the telescope (1912)
Murphy, Edgar Gardner, 1869-1913 · New York, London, G.P. Putnam's Sons · leaf 69
-piece of high power, and the beginner may need atelescope of larger size, three and one-quarter to threeand three-quarter inches of aperture, for its division.The contrast in the colors of the components is very fine.Polaris, the Pole-Star [406], can be divided by a three-inch instrument, with an… … NIGHT-CHART TO THE SKY AS THE OBSERVER FACES SOUTH.SEPT. 1. 8 P.M., AUG. IS, 9 P.M., AUG. 1, 10 P.M., JULY IS, 11 P.M.. JULY 1, 12 P.M. FOR KEY-M.\P TO THIS CHART SEE OPPOSITE PAGE. FOR THE SKY AS THE OBSERVER FACES NORTH, SEE PP. 54, 55. For the sky at other Dates and Hours see Time Schedule, p.…
Astronomy
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