The soil of this district produces scarce any other grain but oats and barley; perhaps because it is poorly cultivated, and almost altogether uninclosed. The few inclosures they have consist of paultry walls of loose stones gathered from the fields, which indeed they cover, as if they had been scattered on purpose. When I expressed my surprize that the peasants did not disencumber their grounds of these stones; a gentleman, well acquainted with the theory as well as practice of farming, assured me that the stones, far from being prejudicial, were serviceable to the crop. This philosopher had ordered a field of his own to be cleared, manured and sown with barley, and the produce was more scanty than before. He caused the stones to be replaced, and next year the crop was as good as ever. The stones were removed a second time, and the harvest failed; they were again brought back, and the ground retrieved its fertility. The same experiment has been tried in different parts of Scotland with the same success--Astonished at this information, I desired to know in what manner he accounted for this strange phenomenon; and he said there were three ways in which the stones might be serviceable. They might possibly restrain an excess in the perspiration of the earth, analogous to colliquative sweats, by which the human body is sometimes wasted and consumed. They might act as so many fences to protect the tender blade from the piercing winds of the spring; or, by multiplying the reflexion of the sun, they might increase the warmth, so as to mitigate the natural chilness of the soil and climate--But, surely this excessive perspiration might be more effectually checked by different kinds of manure, such as ashes, lime, chalk, or marl, of which last it seems there are many pits in this kingdom: as for the warmth, it would be much more equally obtained by inclosures; the cultivation would require less labour; and the ploughs, harrows, and horses, would not suffer half the damage which they now sustain.