Joule, J. P. See vol. iii., p. 269.

On the Calorific Effects of Magneto-Electricity and the Mechanical Value of Heat, in Report of the British Association for the Advancement of Science, 1843, vol. xii" p. 33-

Kirwan, R. See vol. iv., p. 3 ff.

An Essay on Phlogiston and the Constitution of Acids, London, 1789. This is interesting, written as it was just before Lavoisier's Elements treated the same subject from the stand-point of the anti-phlogistic chemists.

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.