Abstract
THE eclipse of Tuesday evening (July 12) exhibited some interesting variations in tint and degree of illumination in different parts of the shadow. There seems to have been a dark spot, perhaps half the moon's diameter, about the centre of the umbra, nearly, if not quite, free from refracted light; outside this a ruddy zone; and beyond this again, to the edge of the shadow, a region strongly illuminated, comparatively speaking, with yellowish pink, as it appeared when projected upon the entering, or yellowish green upon the emerging moon. It is true that just after the commencement, and some little time before the end of the eclipse, the part just within the shadow appeared darker than the eclipsed limb; but this, I think, must have been an optical effect caused by the overpowering light of the uneclipsed portion.
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Thompson, G. Eclipse of the Moon. Nature 2, 236 (1870). https://doi.org/10.1038/002236d0
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DOI: https://doi.org/10.1038/002236d0
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