The _Drills_ are excellent Instruments; yet we imagine them capable of some farther Improvement. Parallel Grooves, at about an Inch asunder, round the Inside of the Hopper, would shew the Man who follows the Drill, whether or no both Boxes vent the Seed equally. By an Hitch from the Plank to the Harrow, the latter may be lifted to a proper Height, so as not to be in the Way when the Ploughman turns at the Headland. Two light Handles on the Plank, like those of the common Plough, would enable the Person who follows the Drill to keep it from falling off the Middle of the Ridge. It may also be useful, in wet Weather, to double the Drills; by which means Two Ridges may be sown at the same time, the Horse going between them: For the Planks of Two Drills, each Plank having one of the Shafts fixed to it, may be joined End for End by Two flat Bars of Iron, one on each Side, well secured by Iron Pins and Screws; and, by corresponding Holes in the Planks and Bars, the Distance between the Drills may be altered, according to the different Spaces between the Ridges. The Alterations made by the Editors of this Impression are little more than omitting the controversial Parts of the Book, which were judged of no Service to the Reader, as they no-ways affected the Merits of Mr. _Tull_’s Principles. But as he endeavoured to recommend his Theory by drawing a Comparison between the Old Method of Culture and the New, so we beg leave to annex a Computation of the Expence and Profit of each; for which we are obliged to a Gentleman, who for some Years practised both in a Country where the Soil was of the same Nature with that from whence Mr. _Tull_ drew his Observations, _viz._ light and chalky. And we chuse to give this the rather, as it comes from one who has no Attachment to Mr. _Tull_’s Method, farther than that he found it answer in his Trials. We appeal to Experience, whether every Article in this Calculation is not estimated in favour of the Common Husbandry; whether the Expence be not rated lower than most Farmers find it, and the Crop such as they would rejoice to see, but seldom do, in the Country where this Computation was made. In the New Husbandry every Article is put at its full Value, and the Crop of each Year is Four Bushels short of the other; tho’, in several Years Experience, it has equalled, and generally exceeded, those of the Neighbourhood in the Old Way. _An Estimate of the Expence and Profit of Ten Acres of Land in Twenty Years._ I. _In the Old Way._ First Year, for Wheat, costs 33_l._ 5_s._ _viz._ _l._ _s._ _d._ _l._ _s._ _d._ First Plowing, at 6_s._ _per_ Acre 3 0 0 Second and Third Ditto, at 8_s._ _per_ Acre 4 0 0 Manure, 30_s._ _per_ Acre 15 0 0 ------------ 22 0 0