[298] Bradley, H. C., and Morse, M., Jour. Biol. Chem., 1915, xxi., 209.

[299] Bradley, H. C., ibid., 1915, xxii., 113.

[300] Loeb, J., Arch. f. d. ges. Physiol., 1895, lxii., 249.

[301] Budgett, S. P., Am. Jour. Physiol., 1898, i., 210.

[302] Loeb, J., The Dynamics of Living Matter, New York, 1906, pp. 19–21.

[303] Child, C. M., Senescence and Rejuvenescence, Chicago, 1915.

[304] It is a fact that in the early cells of Ctenolabrus the dissolu­tion of the cell walls through lack of O precedes death, since when oxygen is admitted early enough the cells recover again. In infusorians the bursting of the animal due to lack of O occurs suddenly, while the animal is still moving, and this bursting is the cause of death, and not the reverse.

[305] Metchnikoff, E., Ann. d. l’Inst. Pasteur, 1915, xxix., 477.

[306] Loeb, J., Biol. Bull., 1902, iii., 295.

[307] Loeb, J., Arch. f. d. ges. Physiol., 1908, cxxiv., 411.