CAR or before him, being quicker or slower than himself : whereas a single horse has only his load to contend with, and is not inconve- nienced by the greater or k height of his fellow. Nor is there any necessity for employing addi- tional drivers ; as horses, once in the habit of going singly, will fol- low each other as uniformly, and steadily, as they do when barncs-ed together : hence, on the most fre- quented roads in Ireland, one man conducts three, four, or five single- horse carts, without any inconve- nience to the passenger. Dimensibtts of the loch/ of the iort employed by Lord Robert Seymour: — Two feet eleven
- nches across the bottom ; three
feet nine inches, inside length ; one foot high ; sloping top, nine nches. Iron wheels. — Two feet eight inches high ; rim, three inches and i half wide, and from three-quar- ters to an inch thick ; spoke, three inches and a quarter at each end, worked off to two inches at its centre. In the introduction to the letter above alluded to, his Lordship ob- serves, that the price of iron east into wheels is l6s. perewt. ; and the weight of each wheel is about three- quarters of a hundred. — Two in- o-'ir. eniencies, however, arise from the use of low east-iron wheel.-, j namely, 1. That such iron is very liable to break upon concussion ; and 2. That the course of a wheel of 90 small a diameter, occasions a very quick consumption of grease; The first of these objections is, in t great measure, removed by the focility with which the rim of the wheel may be repaired by the ap- plication of wrought iron ; the lat- ter being joined to the former by a CAR [4- rivet, the wheel acquires a degree of elasticity, and thus becomes, perhaps, stronger than it was when new. In order to furnish a regular supply of greas •, Lord Robert has introduced lour grooves or ca- vities in the boxes, increasing a little towards their centres : and with a view to defend th - axle- tree, which consists of wrought iron, against the harder bo the box, he ordered the extremity of it to be steeled. Mr. Arthur Young, in the ISth volume of his ylnnals of Agri- culture, before quoted, states the following dimensions of a single- horse cart, which he, by the test of experience, has found to be the most advantageous : Buck. — Length, 5 feet 1 inch. Breadth, 3 feet 7 inches. Depth, 2 feet. Cubical feet, 35 and a fraction. On his farm of 350 acres, in Suffolk, Mr. Young employs only live such carts; and observes, thai he would not add more than one to the number, even though he should increase his business to 4 or 500 acres : hay, corn in the straw, faggot-wood, billets, dung, clav, marl, lime, bricks, See. are ail com eyed by them j carrying out (), and even 10 coombs of wheat in hacks, and they are never drawn by more than one horse or ox. — No farm of the same extent, in w arable count;-}-, has less than I .ous, three tumbrils, and a light cart : the exact price oi different implements, in the i;y2, amounted to lOOl.j while the btiilding of sir carts, upon Mr. Young's plan, costs only 63l. : thus he saves about 40 per cent, in annual repairs. Beside this great reduction of expence, another cir- cumstance
