%0 Book %A Irwin, James, mathematician. %I printed by A. Watson %D 1787 %C Limerick %G English %T A treatise on gunnery : in theory and practice; or the doctrine of projectiles, demonstrated on simple geometrical principles. To which is subjoined an appendix, containing some useful remarks, &c. on surveying. By James Irwin, of Limerick, mathematician.