Bottomless Lakes.-Near the summit of q
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BottomlesS Lakes.-Near the summit of mountain in Portugal, in the province of Beira, IS situated the lake Esura-the waters of which are of a dark greenish hue. AL though no fishes have been ever seen in this lake, yet frequently fragments of ships, such as broken masts, srars, Sc, have been found on 1t, though inland, as is its position. This circumstance has very naturally led to the belief that 1t communicates with the ocean by some subterraneous passage,-a belief which has been still further strengthened from the fact that the face of the lake becomes either rough or smooth as the ocean is found to be agitated or calm; and also that, during stormy weather, 1t produces a rumbling noise, which may be heard at distance of six or eight miles. Itis notorious fact that, to the present day, though frequently tried by the curious, its bottom has not been discovered. At short distance from Rosinere, in Switz- erland, remarkable spring is known to arise, from the centre of natural basin of mere than thirteen square feet in its area. Of the power which operates on 1t we may form some conception, when it is known to force, with much violence, column of water of eighteen feet circular, far above its surface

 Although tried by tho most ingenious and persevering yirtuosoes l natural philosophy, its depth has not been yet ascertaned; thus leavingto conjecture, the only plausible con- clusion, that this spring is the outlet of some accommodating subterrancous lake, which has no other issue for its waters. N. r. SnH.