Home › D › Degree (Th part of the circases where)

Degree (Th part of the circases where)

the 360th part of the circases where an entire organism falls be- cumference of a circle. A degree of low the structural level of its young latitude is the length along a meristages, or where an organ in the same dian, such that the difference of latiway loses its fullness of function, and tude between its N. and S. ends is one becomes more or less atrophied, abortive, degree-i. e., from the two positions and simplified. Thus many parasitic parasitic the altitude of the same star is seen to worms, crustaceans, etc., are emphati- differ by one degree. Another definition cally simpler than their free-swimming is that two points on the earth's surface larvæ, and the sensile adult Ascidian shows only traces of the vertebrate characters which are plain enough in the active young. Thus, too, a crustacean which starts with a well-developed eye, may exhibit the gradual loss of this on assuming a dark habitat. The term is best confined to cases where a level of structure exhibited during early life is more or less lost in the adult. Degeneration must be distinguished (a) from occasional abortion, (b) from reversion to an ancestral type, and (c) from the occurrence of rudimentary and undeveloped organs where a character possessed by ancestral types remains more or less undeveloped, or shows itself only in embryonic life. Degeneration may be due to the environment, or to cessation of function, or to some more subtle constitutional cause. The theory of the degeneration of man from a high state differ in latitude by one degree, when the verticals at these points make angles with the plane of the equator, differing by one degree. Were the earth perfectly spherical in shape, this distance along a meridian would be exactly equal to 1-360 of the whole meridian, and would be the same at all parts of the earth's surface; but owing to its oblately spheroidal shape it increases from the equator, where the curvature is greater, to the poles, where it is less curved. From geodetical measurements made, it is found that at the equator the length of a degree of latitude is 362,746.4 feet; while at the poles it is 366,479.8 feet. The differences between the length of the degree of latitude in different latitudes, thus ascertained by actual measurement, is one of the proofs that the figure of the earth is not that of a sphere but that of an oblate ellipsoid.

DEGREE A degree of longitude is the length between two meridians that make an angle of one degree at the poles, measured by the arc of a circle parallel to the equator passing between them. It is clear that this space is greatest at the equator, and poles; and it can be shown that it varies with the cosine of the angle of latitude . The annexed table shows the lengths of a degree of longitude for places at every degree of latitude from 0° to 90°. tude from 0° tu 90°. It is computed on that the earth is a sphere. 3 2 1 0 Deg. lat.

Eng. Deg. miles. lat.

Eng. miles.

Deg. lat.

Eng. miles. 69.07 31 59.13 61 33.45 69.06 32 58.51 62 32.40 69.03 33 57.87 63 31.33 68.97 34 57.20 64 30.24 4 68.90 35 56.51 65 29.15 5 68.81 36 55.81 66 28.06 6 68.62 37 55.10 67 26.96 7 68.48 38 54.37 68 25.85 8 68.31 39 53.62 69 24.73 9 68.15 40 52.85 70 23.60 10 67.95 41 52.07 71 22.47 11 67.73 42 51.27 72 21.32 12 67.48 43 50.46 73 20.17 13 67.21 44 49.63 74 19.02 14 66.95 45 48.78 75 17.86 15 66.65 46 47.93 76 16.70 16 66.31 47 47.06 77 15.52 17 65.98 48 46.16 78 14.35 18 65.62 49 45.26 79 13.17 19 65.24 50 44.35 80 11.98 20 64.84 51 43.42 81 10.79 21 64.42 52 42.48 82 9.59 22 63.97 53 41.53 83 8.41 23 63.51 54 40.56 84 7.21 24 63.03 55 39.58 85 6.00 25 62.53 56 38.58 86 4.81 26 62.02 57 37.58 87 3.61 27 61.48 58 36.57 88 2.41 28 60.93 59 35.54 89 1.21 29 60.35 60 34.50 90 0.00 30 59.75