Granite forms the great bed of Ireland, and is seen bursting out in all the great ranges of mountains; not only in the central parts of the kingdom, but also in the basaltic district. Ochres, both red and yellow, are found in considerable quantities in many places. Fuller's-earth has already been mentioned: there are also several other saponaceous earths, particularly near the Old-Head of Kinsale in the county of Cork. Slates are found in most parts of Ireland; and flag-stones are worked in great quantities in many districts. The tourist whose time does not admit of much mineralogical research, may yet be amply gratified on that subject whilst in Dublin, by examining the collection at the Society's house. Before starting on an Irish tour, the traveller will naturally be anxious to know what kind of weather he may expect. To this we shall answer shortly in the words of Mr. Aldworth of Cork, in a communication to Mr. Wakefield, wherein he observes that, as an old agriculturist, he is inclined to think that less rain falls in the interior of Ireland than in any of the other British Isles, and yet perhaps there are more wet days there than in the latter; a circumstance which certainly interferes with travelling in an open carriage. As the showers however, though frequent, are not, generally speaking, of very long duration, this inconvenience may be easily guarded against. To this we may add, that the winds which most usually prevail in Ireland blow from the west: they are mild in their temperature, and moist in their nature; but far from being insalubrious. It has also been well observed by the Rev. Horace Townshend, after a long residence, that along the sea coast the winter is disarmed of its severity by the softness of the southern wind, which mitigates the rigour of the frost, and seldom suffers the heaviest snow to remain many hours undissolved, except on the north sides of the high hills. This observation, however, applies principally to the southern coast; where also the sea breeze tempers the summer's warmth by its refreshing breath; so that the greatest degree of heat, as well as cold, is found in the northern districts of the island. The whole island is remarkably bare of trees, and exhibits a naked appearance; which is more striking to a traveller whose eye has been familiarized to the woody counties of England. Yet the varied aspect arising from the frequency of sea views, combined with the rude but grand scenery of the mountains, and the different tints they assume according to their distance, produces a number of beautiful and diversified prospects. The ENTOMOLOGIST will also be certain of finding numerous sources of amusement. Mr. Hall, in his Tour, vol. 2. p. 268, asserts that with a tolerable glass, one sees animals grazing, like cattle in a meadow, on the leaves of every vegetable, and these also much larger than in Great Britain.