The Metamorphoses of Ovid | Page 9

there be light, and there was light,' Genesis, ch. i. ver. 3.]
[Footnote 14: On the right-hand side.--Ver. 45. The "right hand" here refers to the northern part of the globe, and the "left hand" to the southern. He here speaks of the zones. Astronomers have divided the heavens into five parallel circles. First, the equinoctial, which lies in the middle, between the poles of the earth, and obtains its name from the equality of days and nights on the earth while the sun is in its plane. On each side are the two tropics, at the distance of 23 deg. 30 min., and described by the sun when in his greatest declination north and south, or at the summer and winter solstices. That on the north side of the equinoctial is called the tropic of Cancer, because the sun describes it when in that sign of the ecliptic; and that on the south side is, for a similar reason, called the tropic of Capricorn. Again, at the distance of 23? degrees from the poles are two other parallels called the polar circles, either because they are near to the poles, or because, if we suppose the whole frame of the heavens to turn round on the plane of the equinoctial, these circles are marked out by the poles of the ecliptic. By means of these parallels, astronomers have divided the heavens into four zones or tracks. The whole space between the two tropics is the middle or torrid zone, which the equinoctial divides into two equal parts. On each side of this are the temperate zones, which extend from the tropics to the two polar circles. And lastly, the portions enclosed by the polar circles make up the frigid zones. As the planes of these circles produced till they reached the earth, would also impress similar parallels upon it, and divide it in the same manner as they divide the heavens, astronomers have conceived five zones upon the earth, corresponding to those in the heavens, and bounded by the same circles.]
[Footnote 15: That which is the middle one.--Ver. 49. The ecliptic in which the sun moves, cuts the equator in two opposite points, at an angle of 23? degrees; and runs obliquely from one tropic to another, and returns again in a corresponding direction. Hence, the sun, which in the space of a year, performs the revolution of this circle, must in that time be twice vertical to every place in the torrid zone, except directly under the tropics, and his greatest distance from their zenith at noon, cannot exceed 47 degrees. Thus his rays being often perpendicular, or nearly so, and never very oblique, must strike more forcibly, and cause more intense heat in that spot. Being little acquainted with the extent and situation of the earth, the ancients believed it uninhabitable. Modern discovery has shown that this is not the case as to a considerable part of the torrid zone, though with some parts of it our acquaintance is still very limited.]
[Footnote 16: Deep snow covers two.--Ver. 50. The two polar or frigid zones. For as the sun never approaches these nearer than the tropic on that side, and is, during one part of the year, removed by the additional extent of the whole torrid zone, his rays must be very oblique and faint, so as to leave these tracts exposed to almost perpetual cold.]
[Footnote 17: He placed as many more.--Ver. 51. The temperate zones, lying between the torrid and the frigid, partake of the character of each in a modified degree, and are of a middle temperature between hot and cold. Here, too, the distinction of the seasons is manifest. For in either temperate zone, when the sun is in that tropic, which borders upon it, being nearly vertical, the heat must be considerable, and produce summer; but when he is removed to the other tropic by a distance of 47 degrees, his rays will strike but faintly, and winter will be the consequence. The intermediate spaces, while he is moving from one tropic to the other, make spring and autumn.]
[Footnote 18: The brothers.--Ver. 60. That is, the winds, who, according to the Theogony of Hesiod, were the sons of Astreus, the giant, and Aurora.]
[Footnote 19: Eurus took his way.--Ver. 61. The Poet, after remarking that the air is the proper region of the winds, proceeds to take notice that God, to prevent them from making havoc of the creation, subjected them to particular laws, and assigned to each the quarter whence to direct his blasts. Eurus is the east wind, being so called from its name, because it blows from the east. As Aurora, or the morning, was always ushered in by the sun, who rises eastward, she was supposed to have her habitation in the