A course of lectures on natural philosophy and the mechanical arts / Thomas Young. Young, Thomas, 1773-1829. Kelland, Philip, 1808-1879, ed. Science. Q160 .Y78 501 YOC Includes index Authorities in foot-notes and at end of each lecture. London, Printed for Taylor and Walton, 1845. 1845. 1845 Text 2 v. eng