Volume V Part 13 (1/2)

viii., May, 1874), pp. 288, 289.

Playpair, John. See vol. iii., pp. 131, 165.

Ill.u.s.trations 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.

”Experiments on Air,” in Phil. Trans., 1784, p. 119. This paper contains Cavendish's discovery of the composition of water and of nitric acid.

Daguerre, Louis J. M. See vol. iv., p. 70.

Historique et description des procedes du daguerreotype et du diorama, Paris, 1839. (This was translated into English.)

Dalton, John. See vol. iv., p. 40.

”On the Absorption of Gases by Water,” read before the Literary and Philosophical Society of Manchester, October 21, 1803. This was published in 1805, and contains the atomic weight of twenty-one substances, some of which were probably added, or corrected, between the date of the first reading and the publication.

Davy, Sir Humphry. See vol. iv., pp. 48, 209.

”Some Chemical Agencies of Electricity,” in Phil. Trans, for 1806, vol.

viii. Researches, Chemical and Philosophical, chiefly concerning Nitrous Oxide or De-phlogisticated Nitrous Air and its Respiration, London, 1800.

Dewar, James. See vol. v., p. 39.

”Solid Hydrogen,” in Proc. Roy. Inst, for 1900. ”The Nadir of Temperature and Allied Problems ” (Bakerian Lecture), Proc. Roy. Soc, 1901.

Dufay, Cisternay. See vol. ii., p. 267.

Histoire de l'Academie Royale des Sciences, between 1733 and 1737, contains Dufay's princ.i.p.al papers.

Eulbr, Leonard (1707-1783). See vol. iii., p. 17.

Lettres a une Princesse d'Allemagne sur quelques sujets de physique et de philosophie, St. Petersburg, 1768.

Faraday, Michael. See vol. iii., p. 241.

On the Induction of Electric Currents, in Phil. Trans. of Royal Society for 1832, pp. 126-128. Explication of Arago's Magnetic Phenomena, by Michael Faraday, F.R.S., Phil. Trans, of Royal Society for 1832, pp.