It is probable that, in the time of Cato, the Romans had begun to extend their villas considerably, which makes him warn proprietors of land not to be rash in building. When a landlord is thirty-six years of age he may build, provided his fields have been brought into a proper state of cultivation. His direction with regard to the extent of the villa is concise, but seems a very proper one;—he advises, to build in such a manner that the villa may not need a farm, nor the farm a villa. Lucullus and Scævola both violated this golden rule, as we learn from Pliny; who adds, that it will be readily conjectured, from their respective characters, that it was the farm of Scævola which stood in need of the villa, and the villa of Lucullus which required the farm. A vast variety of crops was cultivated by the Romans, and the different kinds were adapted by them, with great care, to the different soils. Cato is very particular in his injunctions on this subject. A field that is of a rich and genial soil should be sown with corn; but, if wet or moist, with turnips and raddish. Figs are to be planted in chalky land; and willows in watery situations, in order to serve as twigs for tying the vines. This being the proper mode of laying out a farm, our author gives a detail of the establishment necessary to keep it up;—the number of workmen, the implements of husbandry, and the farm-offices, with the materials necessary for their construction. He next treats of the management of vineyards and olives; the proper mode of planting, grafting, propping, and fencing: And he is here naturally led to furnish directions for making and preserving the different sorts of wine and oil; as also to specify how much of each is to be allowed to the servants of the family. In discoursing of the cultivation of fields for corn, Cato enjoins the farmer to collect all sorts of weeds for manure. Pigeons’ dung he prefers to that of every animal. He gives orders for burning lime, and for making charcoal and ashes from the branches or twigs of trees. The Romans seem to have been at great pains in draining their fields; and Cato directs the formation both of open and covered drains. Oxen being employed in ploughing the fields, instructions are added for feeding and taking due care of them. The Roman plough has been a subject of much discussion: Two sorts are mentioned by Cato, which he calls _Romanicum_, and _Campanicum_—the first being proper for a stiff, and the other for a light soil. Dickson conjectures, that the _Romanicum_ had an iron Share, and the _Campanicum_ a piece of timber, like the Scotch plough, and a sock driven upon it. The plough, with other agricultural implements, as the _crates_, _rastrum_, _ligo_, and _sarculum_, most of which are mentioned by Cato, form a curious point of Roman antiquities.