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.

"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 procédés du daguerréotype et du diorama, Paris, 1839. (This was translated into English.)