The ship builder's assistant, or Marine architecture: (Revised and improved) containing I. The method of extracting the square and cube roots, geometry and mensuration; wherein all the rules necessary for measuring plank, timber, and finding the tunnage of ships, are laid down in a very plain and conspicuous manner; and illustrated by proper examples. II. Observations on the nature and value of timber; with a new method of procuring it in the necessary forms for ship building. III. The method of drawing the plans of ships, and moulding their timbers; together with all the practical rules necessary to he observed in building the hulls of all sorts of ships. To which is added, the scantling or mensuration of ships timbers. IV. Directions for making the masts and yards of a just proportion to the ship, and also to one another, both with regard to length and thickness. With tables of the weights and sizes of anchors and cables, according to the new establishment. V. The boatswains art: shewing the method of finding exactly the length and thickness of every rope; also cable and cordage tables, shewing by inspection the weight of any rope, whose length and thickness are given. With some directions for cutting out sails. The whole illustrated with a great variety of figures and draughts, engraven on copper plates. By William Sutherland, shipwright and mariner.