Theoria philosophio naturalis redacta ad unicam legem virium in natura existentium, Vienna, 1758. Bradley, James. See vol. iii., p. 13. Concerning an Apparent Motion Observed in Sotne of the Fixed Stars, London, 1748, Phil. Trans., vol. xlv., pp. 8,9. Cuvier,*Baron de. See vol. iv., p. 103. Recherches sur les ossements fossiles de quadrupèdes, 4 vols., Paris, 1812. (The introduction to this work was translated and published as a volume bearing title of Theory of the Earth, New York, 1818.) Delambre, Jean Baptiste Joseph. See vol. iii., p. 16. Histoire d'astronomie, Paris, 1817-1821. This work contains not only the history of the discoveries in astronomy, but is also a complete text-book of astronomy as understood at this period. Falconer, Hugh. See vol. iii., p. 99. In Paloontological Memoirs, vol. ii., pp. 596-598. 252 Herschbl, William. See vol. iii., p. 20 ff. On the Proper Motion of the Solar System, Phil. Trans., vol. 73, for 1783. (This paper was read in March, 1783.) The Constitution of the Heavens, Phil. Trans, for 1785, vol. 75, p. 213. Howard, Luke. See vol. iii., p. 182. Philosophical Magazine, 1803. Humboldt, Alexander von. See vol. iii., p. 192. Des lignes isothermes et de la distribution de la chaleur sur le globe, published in vol. iii., of Mémoires de physique et de chimie de la Société d'Arcueil, Paris, 1819. Hutton, James. See vol. iii., p. 178. Theory of Rain, in Transactions of the Royal Society of Edinburgh, 1788, vol. i., pp. 53-56. See vol. iii., p. 121. From Transactions of the Royal Society of Edinburgh, 1788, vol. i., pp. 214-304. A paper on the "Theory of the Earth," read before the society in 1781. Kant, Immanuel (i724-1804). See vol. iii., p. 27. Allgemeine Naturgeschichte und Théorie des Himmels, 1755. Cosmogony, ed. and trans, by W. Hartie, D.D., Glasgow, 1900. Laplace, M. le Marquis de. See vol. iii., p. 32. Exposition du système du monde, Paris, 1796, is available in Ouvres completes, in 12 vols., Paris, 1825-1833^01. vi., p. 498. Lyell, Charles. See vol. iii., p. 88. Principles of Geology, 4 vols., London, 1834. Marsh, O. C. See vol. Hi., p. 107. Fossil Horses in America (reprinted from American Naturalist, vol. viii., May, 1874), pp. 288, 289. Playpair, John. See vol. iii., pp. 131, 165. Illustrations of the Huttonian Theory, 1802. Scrope, G. Poulett. See vol. iii., p. 132. Consideration of Volcanoes, London, 1823, pp. 228-234. Wells, W. C. See vol. iii., p. 185. Essay on Dew, London, 1818. IV.--MODERN PHYSICAL AND CHEMICAL SCIENCES Black, Joseph. See vol. iv., p. 12. De acido e cibis orlo, et de magnesia, reprinted at Edinburgh, 1854. In this he sketched his discovery of carbonic acid. Later this paper was incorporated in his Experiments on Magnesia, Quicklime, and Other Alkaltne Substances. Bunsen, William. See vol. iv., p. 69. Cavendish, Henry. See vol. iv., p. 15.