 | George Gregory - Science - 1808 - 322 pages
...that is, the portion of the luminary eclipsed, or which is covered by the shadow. To measure this, the diameters of the sun and moon are supposed to be divided into twelve equal parts, which are called digits; and an eclipse is said to be so many digits, according... | |
 | Jedidiah Morse - Geography - 1814 - 378 pages
...sun, and, of course, must happen when the moon is in conjunction with the sun, or at the new moon. The diameters of the sun and moon are supposed to be divided into 12 equal parts, called digits ; and an eclipse is said to be so many digits, according to the number of those pans which are involved... | |
 | John Bonnycastle - Astronomy - 1816 - 490 pages
...earth's shadow will pass through the centre of the moon, and it will be a total and central eclipse. The diameters of the sun and moon are supposed to be divided into twelve equal parts, (PI. xvin. fig. 3.) and an eclipse is said to be of acs so many digits, according... | |
 | Jedidiah Morse - Geography - 1818 - 384 pages
...sun, and, of course, must happen when the moon is in conjunction with the sun, or at the r.ctv moon. The diameters of the sun and moon are supposed to be divided into 1 '-' equal parts, called digits ; and an eclipse is said to be so many digits, according to the number... | |
 | John Hubbard Wilkins - Astronomy - 1822 - 158 pages
...lunar.^ When seven eclipses take place in a year, a node is three times between the sun and earth. 92. The diameters of the sun and moon are supposed to...as there are of those parts involved in darkness. SECT. II. Of Phenomena arising from the Revolution of the Earth on itf own axis. DAY AND NIGHT. 93.... | |
 | Sidney Edwards Morse - Atlases - 1822 - 706 pages
...moon. Hence, it affords a ready method of finding the longitudes of places upon the Earth"? surface. The diameters of the sun and moon are supposed to be divided into 12 equal parts, called digits, and an eclipse is said to be so many digits, according to the number of those parts, which are inyolved... | |
 | Thomas Arnold - Marine insurance - 1822 - 1008 pages
...that is, the portion of the luminary eclipsed, or which is covered by the shadow. To measure this, the diameters of the sun and moon are supposed to be divided into twelve equal parts, which are called digits; and an eclipse is said to be so many digits, according... | |
 | John Hubbard Wilkins - Astronomy - 1825 - 151 pages
...lunar. When seven eclipses take place in a year, a node is three times between the sun and earth. ' 98. The diameters of the sun and moon are supposed to...as there are of those parts involved in darkness. Among the ancients, eclipses were regarded much in the same light that comets were, as alarming deviations... | |
 | S. Treeby - Astronomy - 1826 - 244 pages
...two ; and these two must be both of the sun ; the general number is four; two of each luminary. 224. The diameters of the sun and moon are supposed to be divided into twelve parts, called digits, and as many of these parts as are obscured in an eclipse, so many digits... | |
 | Levi Washburn Leonard - New Hampshire - 1827 - 398 pages
...15. What occasions this kind of eclipses ? 16. How luiig may a total eclipse of the sun last? [NOTE. The diameters of the sun and moon are supposed to be divided into 12 equal parts, called digits. They are said to have as many digits eclipsed as 12th parts involved in darkness.] 17. Look at fig.... | |
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The diameters of the sun and moon are supposed to be divided into 12 equal parts, called digits. These bodies are said to have as many digits eclipsed aa there are of those parts involved in darkness. 
