Tracts on the corn laws of Great Britain : Containing, I. An inquiry into the principles, by which all corn laws ought to be regulated. II. Application of these principles to the corn laws of Great Britain, now collected into one act of Parliament. III. Inquiry into the expediency of repealing all our corn laws, and laying the corn trade entirely open. IV. Outlines of a new corn bill, or of a bill to amend the late corn act, which commenced Nov. 15th, 1791. By George Skene Keith, A.M. minister of Keith-hall and Kinkell, Aberdeenshire, author of tracts on weights, measures and coins, &c.