The geography of the heavens, and class-book of astronomy: accompanied by a celestial atlas (1873)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868, ed, Whitall, Henry, 1819-1887? Celestial planisphere · New York, Sheldon & company · leaf 230
dim, as she enters theEarths penumbra, till at length she comes in contact with theumbra, and the real eclipse begins. 455. In order to measure and record the extent of eclipses,the apparent diameters of the Sun and Moon are divided intotwelve equal parts, called digits; and in predicting… … TWELVE DIGITS. j*****,
Constellations · Stars
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