[155] “The Medical Significance of Old Age,” Med. Press and Circ., London, May 20, 1914.
[156] “The Delay of Old Age and the Alleviation of Senility,” Jour. Amer. Med. Assn., July 15, 1905.
[157] “Centenarians and Nonagenarians,” Med. Rec., Feb. 15, 1913.
[158] “Ancient and Modern Theories of Age,” Maryland Med. Jour., vol. 49, Feb., 1906.
[159] Fads of on Old Physician (Sequel to Plea for a Simpler Life), London, 1897.
[160] “The Conservation of Energy in Those of Advancing Years,” Pop. Sci. Mo., 1903.
[161] “Evidences of Full Maturity and Early Decline,” Pop. Sci. Mo., 1917, p. 411.
[162] Über Altern und Sterben, Wien, 1913, 33 pp.
[163] See his articles in Sci. Mo., March-Sept., 1921.
[164] The Germ Plasm, 1893, p. 198 et seq.