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Table of Contents
36

36.  Marckwald, Phys. Zeit. 4, No. 1 b, p. 51.

37

37.  Marckwald, Ber. d. D. Chem. Ges. p. 2662, No. 12, 1903.

38

38.  Elster and Geitel, Annal. d. Phys. 69, p. 83, 1899.

39

39.  Giesel, Ber. d. D. Chem. Ges. p. 3775, 1901.

40

40.  Hofmann and Strauss, Ber. d. D. Chem. Ges. p. 3035, 1901.

41

41.  Hofmann, Gonder and Wölfl, Annal. d. Phys. No. 13, p. 615, 1904.

42

42.  Hofmann and Zerban, Ber. d. D. Chem. Ges. No. 12, p. 3093, 1903.

43

43.  Baskerville and Zerban, Amer. Chem. Soc. 26, p. 1642, 1904.

CHAPTER II. IONIZATION THEORY OF GASES.

1

44.  J. J. Thomson and Rutherford, Phil. Mag. Nov. 1896.

2

45.  The word ion has now been generally adopted in the literature of the subject. In using this word, it is not assumed that the ions in gases are the same as the corresponding ions in the electrolysis of solutions.

3

46.  A minute current is observed between the plates even if no radio-active matter be present. This has been found to be due mainly to a slight natural radio-activity of the matter composing them. (See chapter XIV.)

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