Implements of EHufbandry.—Harrows. 95

diminifhing the difference between the fore and the hind parts of the harrow. Common harrows may likewife in fome meafure be prevented from having their teeth moving in the fame directions, by being fo yoked or attached to the horfe as to move on the land fomewhat in a diagonal line*. In the conftruction of

all the larger forts of harrows, it is of the utmoft importance that the tines,

or teeth, have a flight inclination forwards, and in all kinds of thefe imple- ments that no two of them move exaétly in the fame line of dire@tion. By thefe improvements, harrows are capable of doing a great deal more work, of keep- ing more clofely to the ground, and of cutting as well as tearing up more effeCtually fuch weeds as they meet with.

It is a good practice to have the teeth, at leaft of large harrows, faftened into the bulls by means of nuts and fcrews, in fuch a way as that they can be removed with facility when neceflary; or, perhaps, a ftill better method is to have the heads of the teeth made{quare, and put upwards into the bulls, having long holes in the parts that come above them, into which fquare wedges may be put in order to keep them faft and prevent their being loft.

Harrows are alfo fometimes conftructed with teeth of unequal lengths. The firft row of tines, for inftance, being a quarter or half an inch fhorter than the fecond, and fo on. Thefe harrows have been faid to do more work, and to be more readily cleanfed of weeds and other fubftances, by which they are liable to be choaked up. Narrows, formed in this way, are common in fome parts of Devon- fhire, and have lately been introduced into Leicefterfhire with fuccefs by Mr. Hanford.‘This kind of implement is made in different ways, and with different uumber of bars or bulls, but from three to five is the moft common, and the quantity of teeth vary in the fame manner.

The Brake-Harrow, the Double-Harrow, and the improved Common Harrow, are all of them good tools when applied under proper management: a harrow in- vented by Mr. Graburn, and reprefented in the Report of the Agriculture of Lin- colnfhire, feems alfo to poflefs confiderable merit, efpecially for lands in which the ridges are narrow and round.

There is a Harrow defigned by Mr. Knight, which is likewife well contrived for obviating the difficulty and inconvenience of turning, as well as leffening the

1 1 Sy(aE ae ie.( leu. a.:~ draught of the horfes, as it is conftructed with wheels; but it would feem to be

much too complex and expenfive in its conftru€tion for general ule. In many

He; rT~. fe‘ Cc srt} * Robertfon’s General View of the Agriculture of the County of Perth, =) 2

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