Hogs are remarkably fond of this root, and thrive very fast with it: cows are also very eager after both leaves and root. Colonel Elliott began feeding his cows with the Mangel Wurzel in July; the weather being very dry, we were very short of grass. We began with the leaves, and soon after with the roots of two pieces, which were transplanted. The cows looked well and increased in their milk, and were partially fed with the roots till the crop was taken up. The roots were then sliced, and as much of them given to the cows (with a little hay) as they could eat; the milk increased immediately, and the cows improved in flesh. My opinion is, that the Mangel Wurzel is a most valuable article of food to the farmer; because, in a severe winter, when turnips are in general destroyed, these roots, properly stacked in a dry place, and covered so as to prevent severe frosts from injuring them, will be a certain supply of nutricious and fattening food, (if cultivated in sufficient quantity) until the spring grass is fit to turn in upon. I should conceive, if the seed is put into the ground in the month of May, after the manner practised in drilling turnips on ridges, that no doubt can be entertained of obtaining a full crop. As Mangel Wurzel exceeds all other winter food, from being preserved under cover without injuring the quality, so it will prevent a recurrence to the expensive food of oil cake or corn. I am, &c. G. T. BOULT. _Kentish Town, December 29, 1814._ SIR,