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proper, as well a the ground. Pieces of wood or ftone, as. heavy as a man can lift, are the mott

fuitable fubftances for loading thefe implements. with, where they have not the ad- vantage of boxes.

The Common Rollers, fach as are mottly ufed for rolling wheat in the fpring, and grafs feeds, are generally about five or fix feet long, and from fifteen to thirty inches in diameter; but thofe employed for flattening one-bout rides, in order to prepare them for drilling turnips upon, are commonly fhorter and of much lefs diameter.

Spike-Rolter.—This kind of implement is formed pretty much in the fame man- ner as the common roller, except in having the addition of a confiderable number of {pikes made to it.‘Thefe rollers are principally employed where the foil is itiff and cloddy, in order to reduce and break down the lumpinefs, and bring the land into a fine{tate; and when well conftru€ted are, in many cafes, good and effective tools for the purpofe.

Drill-Roller.—The Norfolk farmers, we believe, have the merit of this inven- tion. It is formed with rings of caft-iron, round that part which conttitutes the roller, at{mall diftances from each other; by which means drills are made in the land, and the intermediate parts rifing into ridges, the corn of courfe chiefly falls into them, being. thereby better depofited in the earth, and better covered than it would have been if fown upon the furrows without them. The main obje& of this practice is the faving the expence of dibbling, though it is not by any means fo good a practice. On light grounds, where preffure is required, it may, however, be em- ployed with great advantage. It may alfo be made ule of in dry feafons for reducing {tiff clayey lands which are under fallow; for which purpofe it is, perhaps, a more efficient implement than the fpike-roller.. Where this roller is made ufe of, the feed is fown broad-eaft, and covered by means of a{mall or bufh harrow. The wooden rollers which are frequently, and with great propriety, had recourfe to, for rendering grafs and pafture lands{mooth and even, are in many places much too large to produce the powerful effet they are intended to have, without a proportionate increafe of weight was added, for the reafons which have been juft given. They fhould there- fore be made lefs in fize, and be loaded, in order to produce the great degree of preflure which is wanted in thefe cafes.

As in turning at the ends of ridges or fields, rollers, from their not mov- ing upon their axis, but being drawn. along the furface of the ground, are liable to tear it up, and make deep holes and depreflions before they come again into the direét line of draught, and are not brought round without great exertion in the team; it has been attempted, in order to obviate thefe inconve- niences, to conftruct rollers in two pieces, and by the divifion in the middle to

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