This is the mainstay of the county, and considering the somewhat uncertain climate, the shortness of the summer and the natural poverty of the soil, it has been brought to marvellous perfection. The mountainous regions are necessarily cut off from this industry except in narrow fringes along the river banks, but in the low-lying area it is safe to say that every acre of ground worth reclaiming has been put to the plough. A century ago the industry was rude and ill-organised, the county being without roads and without wheeled vehicles, but the advent of railways gave an impetus to the farming instinct and an extraordinary activity set in to reclaim waste land by clearing it of stones, by trenching, by draining and manuring it. The proprietors were usually agreeable to granting a long lease at a nominal rent to any likely and energetic man who was willing to undertake reclamations and take his chance of recouping himself for outlays before his lease expired. Being thus secured, the farmer or crofter had an incentive to put the maximum of labour into his holding. He often built the dwelling-house, and as a rule made the enclosures by means of the stones, which, with great labour, he dragged from the fields. In this way a great acreage was added to the arable land of the county, and though some of it has fallen into pasture since the great boom in agricultural prices during the seventies in last century, the greater part of the reclaimed soil is still in cultivation. The area of the county, exclusive of water and roadways, is 1955 square miles, or 1,251,451 acres. Of this exactly one half is under cultivation, 628,523 acres. When we remember that Scotland contains some nineteen million of acres and that only 25 per cent. of this acreage is arable land, it is apparent that Aberdeen with its 50 per cent. is one of the most cultivated areas. As a matter of fact it has by far the largest acreage under cultivation of any Scottish county. Next to it is Perthshire with 336,251 acres. The uncultivated half is made up of mountain, moor and woodlands. Part of this is used for grazing sheep, as much as 157,955 acres being thus utilised. In the matter of woods and plantations the county with its 105,931 acres stands next to Inverness-shire, which has 145,629. The trees grown are mostly larch and pine and spruce, but the deciduous trees, or hard woods, the beech, elm and ash, are not uncommon in the low country, more especially as ornamental trees around the manor-houses of the proprietors.