Lectures in natural philosophy : designed, to be a foundation, for reasoning pertinently, upon the petrifications, gems, crystals, and sanative quality of Lough Neagh in Ireland; and intended to be an introduction, to the natural history of several counties contiguous to that lake, particularly ... Ardmagh. By Richard Barton. - Barton, Richard, (printed for the author, by A. Reilly, and sold by George and Alexander Ewing,, 1751)