[14] Walker, G., Johns Hopkins Hospital Bulletin, XII, 1901, p. 129.

[15] Cp. R. H. Compton, New Phytologist, 1911, p. 249.

[16] Arch. f. Entwickelungsmech., 1907, XXIII, p. 249.

[17] Bull. Soc. Bot. de France, xxxiv, 1887, p. 182.

[18] R. Boyle, The Origine of Formes and Qualities, Oxford, 1666.

[19] Remarkable experiments on this question have lately been carried out by R. H. Compton (Camb. Phil. Soc., XV, 1910, p. 495), showing that in a certain Barley, "Plumage Corn," the average ratio of left to right is about 1.5. A fuller paper has since been published by Compton, Jour. Genetics, 1912, II, I, p. 53.


FOOTNOTES: CHAPTER III.

[1] Stéphane Leduc, Théorie Physico-Chymique de la Vie, Paris, 1910.

[2] Materials for the Study of Variation, No. 249, p. 217; and p. 272.