 | Jacques Ozanam - 1803 - 660 pages
...farther from the centre of the earth ; and a line equally distant from that centre in all its parts, is called the line of true level. Hence, because the earth is round, that line must be a curve, or at least parallel or concentric to it. But the line of sight, given by operations of levelling,... | |
 | Samuel Webber - 1808 - 520 pages
...called the line of apparent level. But a line, as AD, equally distant from the centre of the earth in all its points, is called the line of true level. Hence DB is the height of the apparent above the true level at the distance AD or AB, being the difference... | |
 | George Adams - 1813 - 648 pages
...line has all its points equally distant from the centre, it is called the line of true level; whence, because the earth is round, that line must be a curve, and make a part of the earth's circumference, as the line ABED, all the points of which are equallydistant from the centre C of the earth ; but the... | |
 | Jacques Ozanam - 1814 - 518 pages
...earth ; and a line equally distant from that centre in all its parts, is called the line of true levei. Hence, because the earth is round, that line must be a curve, or at least parallel or concentric to it. But the line of sight, given by operations of levelling,... | |
 | James Mitchell - 1823 - 666 pages
...than another, or out of level with it, when it ia farther from the centre of the earth; and a line equally distant from that centre in all its points,...called the line of true level. Hence, because the eartb is round, the line must be a curve, and make a part of the earth's circumference, or at least... | |
 | Frederick Walter Simms - 1834 - 134 pages
...the centre of the earth ; and a line equally distant from that centre in all its parts, is called a line of true level. Hence, because the earth is round,...make a part of the earth's circumference, or at least be parallel to it; as the line IBCFG, which has all its points equally distant from A, the centre of... | |
 | Jacques Ozanam - 1840 - 850 pages
...centre of the earth ; and a line equally distant from that centre in all its parts, is called the lint of true level. Hence, because the earth is round, that line must be a curve, or at least parallel or concentric to it. But the line of sight, given by operations of levelling,... | |
 | Abraham Crocker - 1841 - 486 pages
...than another, or out of level with it, when it is farther from the centre of the earth : and a line equally distant from that centre, in all its points,...make a part of the earth's circumference, or at least be parallel to it, and concentrical with it ; as the line BCFG, which has all its points equally distant... | |
 | John Carr - 1843 - 408 pages
...are on a trne level, when they are eqnally distant from the centre of the earth ; and a line eqnally distant from that centre in all its points, is called the line of trne level. This line is nearly an arc of a circle, and will evidently pass below the line of apparent... | |
 | Francis Henney Smith - 1845 - 710 pages
...places are on a true level, when they are equally distant from the centre of the earth ; and a line equally distant from that centre in all its points, is called the line of true level. Tills line is nearly an arc of a circle, and will evidently pass below the line of apparent level,... | |
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Also one place is higher than another, or out of level with it, when it is farther from the centre of the earth : and a line equally distant from that centre, in all its points, is called the line of true level. Hence, because the earth is round, that... 
