Our Cincinnati observer mentions three kinds of snails which move along at the rate of a mile in forty-four hours; they inhabit the most dense forests, and it is regarded as a sure indication of rain to observe them moving towards an exposed situation. Others indicate the weather not only by exuding fluids, but by the colour of the animal. After rain the snail has a very dark appearance, but it grows of a bright colour as the water is expended; whilst just before rain it is of yellowish white colour, also just before rain streaks appear from the point of the head to the jointure of the shell. These snails move at the rate of a mile in fourteen days and sixteen hours. If they are observed ascending a cliff it is a sure indication of rain: they live in the cavities of the sides of cliffs. There is also a snail which is brown, tinged with blue on the edges before rain, but black after rain: a few days before appears an indentation, which grows deeper as the rain approaches. The leaves of trees are even good barometers: most of them for a short, light rain, will turn up so as to receive their fill of water; but for a long rain they are doubled, so as to conduct the water away. The Frog and Toad are sure indicators of rain; for, as they do not drink water but absorb it into their bodies, they are sure to be found out at the time they expect rain. The Locust and Grasshopper are also good indicators of a storm; a few hours before rain they are to be found under the leaves of trees and in the hollow trunks. The Mole has long been recorded as a prognosticator of change of weather, before which it becomes very active. The temperature or dryness of the air governs its motions as to the depth at which it lives or works. This is partly from its inability to bear cold or thirst, but chiefly from its being necessitated to follow its natural food, the earth-worm, which always descends as the cold or drought increases. In frosty weather both worms and moles are deeper in the ground than at other times; and both seem to be sensible of an approaching change to warmer weather before there are any perceptible signs of it in the atmosphere. When it is observed, therefore, that Moles are casting hills through openings in the frozen turf or through a thin covering of snow, a change to open weather may be shortly expected. The cause of this appears to be--the natural heat of the earth being for a time pent in by the frozen surface accumulates below it; first incites to action the animals, thaws the frozen surface, and at length escapes into the air, which is warm, and softens; and if not counterbalanced by a greater degree of cold in the atmosphere brings about a change, such as from frosty to mild weather. The Mole is most active and casts up most earth immediately before rain, and in the winter before a thaw, because at those times the worms and insects begin to be in motion, and approach the surface.