A treatise of artillery [electronic resource] : containing I. General constructions of brass and iron guns used by sea and land, and their Carriages. II. General Constructions of Mortars and Howitzes, their Beds and Carriages. III. Dimensions of all Carriages used in Artillery. IV. Exercise of the Regiment at Home, and Service Abroad in a Siege of Battle. V. Its March and Encampment, Ammunition, Stores, and Horses. VI. Lastly, The necessary Laboratory Work for Fire-Ships, &c. To which is prefixed, an introduction, with a theory of powder applied to fire-arms. By John Muller, Professor of Artillery and Fortification, And Preceptor of Engineering, &c. to his Royal Highness the Duke of Gloucester.