It is unquestionably true that "appointed signs foreshow the weather," to a great extent, every where, but with more certainty in the climate in which Virgil wrote than in our variable and excessive one. "Showers" and "freezing gales" we can, perhaps, as well understand; but the "_reign of heat_," by which he probably meant the dry period, when the southern edge of the extra-tropical belt of rains is carried up to the north of them, we do not experience. Something like it we did indeed have, during the excessive northern transit, in the summer of 1854; but it was an exception, not the rule. Some of the most important of those signs from Virgil and Jenner I propose to allude to in detail; but it is necessary to look; in the first place, to the character of the season and the month. We have seen that the years differ during different periods of the same decade. That they incline to be hot and irregular during the early part of it, and cool, regular, and productive during the latter portion--subject, however, to occasional exceptions. The latter half of the third decade of this century (1826 to 1830, inclusive) was comparatively warm; and, in the latitude of 41 deg., was very unhealthy, and so continued during the early part of the next, over the hemisphere, embracing the _cholera seasons_. The spots upon the sun were much less numerous than usual, during the latter half of the third decade. Thus the spots from 1826 to 1830, inclusive, were 873 1836 to 1840 " " 1201 1846 to 1850 " " 1168 and the size of those from 1836 to 1840 exceeded those of the other years.