The mariners jewel

Or, a pocket companion for the ingenious. Containing a general pay-table; with a table of boatswain stores for each rank of ships; the proportion of prizes, with many other useful things, both decimally and vulgarly demonstrated

By James Lightbody, P.M. To which is added, the Extraction of the square and cube root; the working of a ship at sea in all weathers; an explanation of the most usual sea-terms; a new list of the Royal Navy, with the number of their men and guns; the principal heads of an Act of Parliament, for the encouragement of seamen, with the advantages of registring, and a compendium of sea-gunnery, by J. Russell