Cosmos a Sketch of a Physical Description of the Universe volume 4

Cover Cosmos a Sketch of a Physical Description of the Universe volume 4
Cosmos a Sketch of a Physical Description of the Universe volume 4
Humboldt, Alexander Von, 1769-1859
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346-353. The frequently mentioned proof of the existence of an atmosphere round the Moon, derived from the greater or less perceptibility of small superficial configurations and "the Moon- clouds moving round in the valleys, " is the most untenable of all, on account of the continually-varying condition (darkening and bi'ighten- ing) of the upper strata of our own atmosphere. Considerations as to the form of one of the Moon's horns qn the occasion of the solar eclipso on the 5th of Septepber, 1...793, induced William Herschel to decide against the assumption of a lunar atmosphere. (Pkilos. Transact. , vol. Ixxxiv. , p. 167. ) t Madler, in Schumacher's Jahrbuch for 1840, p. 188.
j Sir John Herschel (Outlines, p. 247) directs attention to the ingress of such double stars as can not be seen separately by the telescope, on account of the too great proximity of the individual stars of which they consist.
THE MOON. 149 a subject of discussion between Arago and Plateau whether the phenomenon here mentioned depends upon deceptive per- ception and physiological causes, *^ or upon the aberration of sphericity and refrangibility of the eye.


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