Plate VIII. ten tinned.

radiuses of (hanks fixed to infide of expanding (hares, which go through beam and regulate widthof hoe, fixed to different widths by bolts paffing through them and beam ; dotted lines/upper partsof mould-boards •, g middle bun of expanding harrow three inches fquare and two feet nine incheslong;/;£ expanding buns, three inches fquare and two feet fix inches long, fixed to middle oneby ftrong hinges; i i two circular iron radiuses fixed in expanding buns, and ferving to regulatethe harrow to any width.

Fig. 5. The profile of a fix-(hared horfe-hoe on the principle of the pentagraph, improvedby Mr. Amos by the addition of two caftor-wheels to regulate depth. It moves with eafe toright or left; a a fe&ion of coulter-bar of drill, to which it is fixed by eye-bolt; b piece of a(hthree inches fquare and fixteen long, narrow before to hook on bolt paffing coulter-bar;c another piece thirteen inches long, fixed between iron bar at twelve inches diftance by fourfcrew-bolts; the bars are two inches broad, half an inch thick, and forty-one long; d fedbionof coulter-bar four by three inches fquare, moveable between pieces of wood and iron bars;g (hare with (hank fixteen inches long and one and a half by half inch fquare, fixed in coulter-bar, being riveted in hind part of (hare; e caftor-wheel, eight inches in diameter and two thickat centre; /handle fixed to piece of wood c by two bolts and ferews.

Fig. 6. A horizontal view of a fix-(hared horfe-hoe; a coulter-bar of drill, to which it is fixedin working; l c iron bars, between which coulter-bar moves on bolt, in which are holes for drift-ing in different ways; d bar in which hoes are fixed; jigs. 8. and 9. manner of fixing them whenrows of corn are eight or nine inches afunder; g g g three (hares in form of triangle, two forefides of which are feven inches long, and hind fide fix; /handle for left fide fixed to end offide frame by two bolts: the numbers j, 2, 3, 4, reprefent four rows of corn at nine inchesapart.

Fig. 7. A horizontal view of coulter thirteen inches long below coulter-bar. There arefeven, which are ufed in place of hoes in ftiffftony or weedy land.

F’g, 8, A profile of a coulter made (harp on fore edge in order to operate more eafilv.