OF ASPECT, ROTATION, AND LIBKATION. 157

sarily passes through Pisces and Aries, and throughVirgo and Libra in each lunation. But it is only inspring that the full moon is in Libra and Virgo, andin autumn that the full moon is in Pisces and Aries.The autumn phenomena are the more important, sincethey result in nights almost completely moonlit forfour or five days in succession. We have at, and nearthe time of full moon in September, the moon risingnot far on either side of six in the evening, andthough the hour of setting varies considerably, yetthis is obviously a matter of small importance, sincethe moon sets in the morning hours. The operationsof harvesting can thus be continued far on into thenight, or all night if need be. This relates, however(at least in England), to the full moon preceding themiddle of September, for harvesting operations arenearly always completed throughout England beforethat time. The full moon following September, whichpartakes to about an equal degree with that precedingthe autumnal equinox, in the peculiarity we have beendealing with, is sometimes called the hunter’s moon.

In latitudes higher than ours the phenomena of thehanwst moon and hunter’s moon are more marked,because the angle H E M' (fig. 52) grows smaller andsmaller as the arctic circle is approached. At thearctic circle this angle vanishes, and the moon, whenmoving parallel to the ecliptic, rises night after night(for a time in each lunation) at the same siderealtime, or nearly four minutes earlier on successive nights.However, into such peculiarities as these we do not