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CONTENTS.
XV. On a new principle of constructing His Majesty's Ships of War. By Robert Seppings, Esq. one of the Surveyors of His Majesty's Navy. Communicated by the Right Hon. Sir Joseph Banks, Bart. K.B. P.R.S. page 285
XVI. Remarks on the employment of Oblique Riders, and on other alterations in the construction of Ships. Being the substance of a Report presented to the Board of Admiralty, with additional demonstrations and illustrations. By Thomas Young, M.D. For. Sec. R. S. p. 303
XVII. Some further Observations on Atmospherical Refraction. By Stephen Groombridge, Esq. F.R.S. p. 337
XVIII. Propositions containing some Properties of Tangents to Circles; and of Trapeziums inscribed in Circles, and non-inscribed. Together with Propositions on the Elliptic Representations of Circles, upon a plane surface, by Perspective. By Richard Hey, LL. D.; late Fellow of Sidney Sussex and Magdalen Colleges, in the University of Cambridge. Communicated by the Rev. Edward Balme, M.A.F.R.S. p. 348
XIX. On new Properties of light exhibited in the optical Phenomena of Mother of Pearl, and other Bodies to which the superficial structure of that Substance can be communicated. By David Brewster, LL.D. F.R.S. Edin. and F.S.A. Edin. In a Letter addressed to the Right Hon. Sir Joseph Banks, Bart. K.B.P.R.S. p. 397
