The mariner's jewel : 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 easie and exact method for all gunners, carpenters, and boatswains, whereby to know the expence of their stories 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 thereto; a guide for pursers and stewards; the most usual terms at sea explained, 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 seasaring men.