The ship-Builder's assistant [electronic resource] : or, marine architecture. Containing I. Decimals, the Extraction of the Square and Cube Roots, also Geometry and Mensuration: With Rules for finding the Content of Plank and Timber, also the Tunnage of Ships, illustrated by proper Examples. II. Observations on the nature and value of timber, and how to procure it in the necessary Forms for Shipbuilding. III. The methods of drawing plans of ships, and moulding their Timbers; with the practical Rules to be observed in building the Hulls of different Ships: To which is added, the Scantling or Dimension of Ships Timbers. IV. Directions for making masts and yards in just proportion to the ship, and to each other. Also Tables of the Weights and Sizes of Anchors and Cables, according to the New Establishment. V. The boatswains art: Shewing the Method of finding the Length and Thickness of every Rope. Also Cable and Cordage Tables, shewing by Inspection the Weight of any Rope. With Directions for Cutting out Sails. The whole revised, corrected, and illustrated with many copper-plates. By William Sutherland, Shipwright and Mariner.