The mariner's jewel [electronic resource] : or, a pocket companion for the ingenious. Containing decimal arithmetick; extraction of the square root; to know the burthen, and how to rig a ship; with an Easy and Exact Method for all Gunners, Carpenters, and Boatswanes, whereby to know the Expence of their Stores every Month, and what they have Remaining; with Proper Directions for making of Masts and Yards according to Proportion; With a new List of the Royal Navy; A General Pay-Table for all Degrees of Men; An Abstract of Parliament for the Encouragement of Seamen, with Her Majesty's Approbation hereto; A Guide for Pursers and Stewards; The most usual Terms at Sea explain'd, with Directions how to work a Ship at Sea; And a Compendium of Sea-Gunnery; With several other things needful to be understood by all Sorts of Sea-Faring Men. By James Love, Mathematician.