The posthumous works [electronic resource] : of Mr. John Ward, Author of the Young Mathematician's Guide. In two parts. Part I. Containing, His New Method of Navigation by Parallel Parts, by which all Questions in Sailing may be answered with great Expedition and Truth, in a different Manner from Plain Mercator, and Great Circle Sailing, by the Solution of a plain Triangle only. Also, Compendiums of Practical and Speculative Geometry, and of Plain Trigonometry, with their Application to Plain Mercator, and Middle Latitude Sailing, with several curious Questions in Surveying. Part II. Containing, The Doctrine of the Sphere, and the Demonstrations and Calculations of Spherical Trigonometry, in which the Construction of the Figures are New, and drawn so as to represent Solids, by which the Demonstrations are made easy to the meanest Capacity. Published by a particular friend of the author's, from the original manuscript, and revised by Mr. George Gordon, Mathematician in London.