58 Physiolog. Notizen (9), p. 425, 1895. Cf. Strasbû¥rger, Ueber die WirkungssphûÊre der Kerne und die ZellgrûÑsse, Histolog. Beitr. (5), pp. 95ã129, 1893; J. J. Gerassimow, Ueber die GrûÑsse des Zellkernes, Beih. Bot. Centralbl. XVIII, 1905; also G. Levi and T. Terni, Le variazioni dellã indice plasmatico-nucleare durante lãintercinesi, Arch. Ital. di Anat. X, p. 545, 1911.
59 Arch. f. Entw. Mech. IV, 1898, pp. 75, 247.
60 Conklin, E. G., Cell-size and nuclear-size, J. Exp. Zool. XII. pp. 1ã98, 1912.
61 Thus the fibres of the crystalline lens are of the same size in large and small dogs; Rabl, Z. f. w. Z. LXVII, 1899. Cf. (int. al.) Pearson, On the Size of the Blood-corpuscles in Rana, Biometrika, VI, p. 403, 1909. Dr Thomas Young caught sight of the phenomenon, early in last century: ãThe solid particles of the blood do not by any means vary in magnitude in the same ratio with the bulk of the animal,ã Natural Philosophy, ed. 1845, p. 466; and Leeuwenhoek and Stephen Hales were aware of it a hundred years before. But in this case, though the blood-corpuscles show no relation of magnitude to the size of the animal, they do seem to have some relation to its activity. At least the corpuscles in the sluggish Amphibia are much the largest known to us, while the smallest are found among the deer and other agile and speedy mammals. (Cf. Gulliver, P.Z.S. 1875, p. 474, etc.) This apparent correlation may have its bearing on modern views of the surface-condensation or adsorption of oxygen in the blood-corpuscles, a process which would be greatly facilitated and intensified by the increase of surface due to their minuteness.
62 Cf. P. Enriques, La forma come funzione della grandezza: Ricerche sui gangli nervosi degli Invertebrati, Arch. f. Entw. Mech. XXV, p. 655, 1907ã8.