f vta 'i pli i ti itj , both of the !u>) of ih the u heels I | are thii'i k'-ju in their proper din in the furrow ; and as the) occupy ■ small space of ground, implement is more easily and con- veniently <ui ned. the breadth of the furrows frequently varies^ Mr. Knight has, for contra! ting the h irrow,
- is implement, that
part of the bar B,. which is fastened by two pins, b, b, can be taken Off, as often as may be found necessar) . Tart of the axle-tree, and of the hind bar C, both of which an cured bv the iron bolt D, may also be removed : the exterior parts, that still remain,may be joined and fastened b the two pins in the bar, and by a shorter bolt d, in- tended tor the axle-tree and hind- bar : '*. • ll [43 I - If farmers work the harrow with two horses of unequal height, the horizontal direction or evenness of the joints is apt to be considerably changed. To remedy this inequa- lity in the size of cattle, the inven- tor has added a ivhipple-trce E, that may be raised or lowered at pleasure, by means of notches, e, to which it is cor^ne&ed by a ring. In light, b irli ) I aids, wheri tho h ni. 1 to the draught o( I . ■ ; . ■ ■ 1 1 qu d number of rings from the axle-tree, ops jf, beneath the hind-bar is sup- ported by the wheel F, which is delineated both in the first cut, and ill the second, on a larger scald: by die aid oi lliis wheel, the intpje- ment is conveyed to the field on the axle-tree bar ; as a sub- stitute for a sledge. There are a so two wooden pegs g, g, by which the harrows are secured, when turned upon the carnage. In ease it should beobje&ed, that the harrow must be expensive on account of the iron, the inventor state.,, that an axle-tree and j< ints maybe readily cons trusted of wood, upon the same -principles as exhi- bited in the last cut, at the letter G ; though he prefers iron to v.ny other material : and, if the wheel under the hind-bars should not be adopted, Mr. Knight has placed a slider, H, that works widi a pin, and, when not in use., is fastened under the axle-tree. He observes, that his harrow may be easily raised or lowered, according to the surface of the land, bv fixing an iron with notches (similar to those on the fore-bar, which sup- port the whippk -trees), on tlie hind-bar. instead of the hooks; and bv putting the latter on those irons. He computes the price of his har- rows, if new iron be employed,, at 41. 13s. In the " Letters and Papers rtf the Bath and West of England So- cie-y," is an account of an imple- ment, invented by the Hon. Mr. R. Sandilasds, and denominated by him a Chain cud Screw Urn row, of
