||A Treatise On Ship-Building And Navigation. In Three Parts Wherein The Theory, Practise, and Application of all the necessary Instruments are perspicuously handled. With The Construction and Use of a new invented Shipwright's Sector, for readily laying down and delineating ships, whether of similar or dissimilar Forms. Also Tables of the Sun's Declination, of Meridional Parts, of difference of Latitude and Departure, of Logarithms, and of artificial Sines, Tangents and Secants. By Mungo Murray. Shipwright, in his Majesty's Yard, Deptford. To which is added by way of Appendix, An English Abridgment of another Treatise on Naval Architecture, lately published at Paris by M. Duhamel, Mem. of the R. Acad. of Sciences, Fellow of the Royal Society of London, and Surveyor General of the French Marine. The whole illustrated with eighteen Copper Plates.