The practical sea-gunner's companion: or, An introduction to the art of gunnery [electronic resource] : Containing, decimal arithmetic, practical geometry, trigonometry, with its application to the measuring of heights and distances: the duty of a gunner, &c. The true allowance of powder for proof, service, salutes, and scaling of all ordnance now in use. The nature, length and weight of iron ordnance: of the specific gravity of lead, brass, iron, &c. with its use in finding the weight of different kinds of metals. Also, the true diameters of the bores and ball, whereby the wind allowance is exactly known: the weight and diameters of iron spheres, magnitude and weight of the several shells (now in use) when empty or filled; length of the fuzes and time of burning, &c. Of carcasses ancient and modern; a catalogue of gunners and armourers stores, with the quantity of arms allowed for a ship of each class, new establishment; and several other particulars, as will appear by the table of contents. Being the substance of the captain Povey and Binning, with large additions and improvements. By William Mountaine, teacher of the mathematics.