Kleist, Dean von. See vol. ii., p. 280. In the Danzick Memoirs, vol. i. contains the description given by Von Kleist of his discovery of the Leyden jar. A translation is given also in Priestley's History of Electricity. Lavoisier, Antoine Laurent. See vol. iv., p. 33. Traité élémentaire de chimie, Paris, 1774, trans, as Elements of Chemistry, by Robert Kerr, London and Edinburgh, 1790. Lister, Joseph Jackson. See vol. iv., p. 113. On Some Properties in Achromatic Object Glasses Applicable to the Improvement of the Microscope, in Phil. Trans, for 1830. Maxwell, James Clerk-. See vol. iii., p. 45. " On the Motions and Collisions of Perfectly Elastic Spheres " in Philosophical Magazine for January and July, i860. The Scientific Papers of J. Clerk-Maxwell, edited by W. D. Nevin (2 vols.), vol. i., pp. 372-374, Cambridge, 1896. This is a reprint of Maxwell's prize paper of 1859. Mayer, Dr. Julius Robert. See vol. iii., p. 259. The Forces of Inorganic Nature, 1842. This is Mayer's statement of the conservation of energy. Mendelèepp, Dmitri Ivanovitch. See vol. iv., p. 68. Principles of Chemistry, 2 vols., London, 1868-1870. (There have been several subsequent editions.) Oersted, Hans Christian. See vol. iii., p. 236. Experiments with the Effects of the Electric Current on the Magnetic Needle, published at Berlin, 1816. Priestley, Joseph. See vol. iv., pp. 20, 36. Experiments and Observations on Different Kinds of Air, 3 vols., Birmingham, 1790. History of Electricity, 256 vol. ii., p. 280, London, 1775. The Doctrine of Phlogiston Established, 1800. Ramsay and Ravlbigh. See vol. v., p. 86. "On an Anomaly Encountered in Determining the Density of Nitrogen Gas," in Proc. Roy. Soc, April, 1894. A statement of the properties of argon was made by the discoverers to the Royal Society, given in Phil. Trans., clxxxvi., p. 187, January, 1895. ScHBBLB, Karl William. See vol. iv., p. 23. Om Brunsten, eller Magnesia, och dess Egenakaper, Stockholm,1774. This contains his discovery of chlorine. His book, Chemische Abhandlung von der Luft und dent Feuer, was published in 1777. Thompson, Benjamin (Count Rumford). See vol. iii., p. 208. Essays Political, Economical, and Philosophical (2 vols.), vol. ii., pp. 470-493, London, T. Cadell, Jr., and W. Davies, 1797. Thomson, William (Lord Kelvin). See vol. iii., p. 276. On a Universal Tendency in Nature to the Dissipation of Mechanical Energy, in Transactions of the Royal Society of Edinburgh, 1852. Wollaston, William Hyde. See vol. iv., p. 41. Phil. Trans, for 1814, vol. civ., p. i, contains a synoptic scale of chemical equivalents. This paper was confirmatory of Dalton's theory. Young, Thomas. See vol. iii., p. 218. On the Colors of Thin Plates» I.e. in Phil. Trans, for 1802, pp. 35-37. V.--MODERN BIOLOGICAL SCIENCES Avenbruggbr, Lbopold. See vol. iv., p. 200. Inventum novum ex percussione thoracis humant interni pectoris morbos detegendi, Vienna, 1761. vot. V.-17 257