PLATE II.

Swing- Ploughs.

[To face Page 40.]

Fig- 1. Is a reprefentation of the Rotheram or patent plough. As this fort of plough isnot incumbered with wheels, it mud be the mod free from fri&ion, and the refidance whichnecefiarily proceeds from that caufe ; confequently, may in general be faid to be the lightedof draught.

Fig. 2. Reprefents Small’s chain-plough, which will be found highly ufeful in cultivatingdrong lands and rough grounds; for, fhould the fhare, or coulter, fuddenly meet with anyobdruction, the drain would be immediately thrown upon the chain, indead of the beam.

Fig. 3. Is a fwing-plough, with Lord Somerville’s improved mould-board.

From the clean fharpened conftru&ion of the bread and throat of this plough, deep diffland may be broken up with great fuccefs; and as the extremity of the mould-board ismoveable, the furrows may be laid more or lefs flat, according to the circumdances of thecafe.