Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 332
dering such a subject that reliablepositive evidence ought to outweigh a large amount of nega-tive evidence. 174. Explanations of the Canals of Mars. — The explana-tions of the canals of Mars have been extremely varied.Many astronomers believe they are illusions of some sort.They think the eye in… … Fig. 107. — Drawings of Mars in 1894 byBarnard at the Lick Observatory. 286 AN INTRODUCTION TO ASTRONOMY [ch. ix, 174 a number of persons make drawings of what they could seeon a disk covered with irregular marks and held slightlybeyond the limits of distinct vision, strikingly confirm…
Astronomy
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