The economy of the barn, or, A dialogue between a farmer and an economist, on the separation and preservation of corn : in which is shewn the national importance and individual interest, by bringing into general use a more certain and perfect mode of separating and preserving the farinaceous products of this country : with microscopal drawings of the different corns and their chaffs, describing the best mode of starting them from the straw : also appropriate descriptions of a complete set of new machines for making a perfect separation, invented by the author.