Contents of vols. 1-3 first issued in 598 weekly folio numbers, March 30, 1692-Sept. 24, 1703. Vol. 4, the only vol. with 1728 imprint date, was first published in 1681-3 under the title: A collection of letters for the improvement of husbandry and trade, and may have been intended for the 1728 "Second edition" of the main work.
Running title: A collection for improvement of husbandry and trade.
"A cataogue of the books in the library of the Royal Society, relating to agriculture": v. 4, p. 5-6.