CHAPTER XII

On the Physical Basis of Life, Huxley, 1868; Reprint in Methods and Results, 1894. Article Protoplasm in Ency. Brit, by Geddes. Dujardin: _Notice Biographique_, with portraits and other illustrations, Joubin, _Archives de Parasitol._, vol. 4, 1901; portrait of Dujardin hitherto unpublished. Dujardin's original description of Sarcode, _Ann. des Sci. Nat._ (_Botanique_), vol. 4, p. 367, 1835. Von Mohl: Sachs' History of Botany, 1890. Translation of his researches, Sydenham Soc., 1847. Cohn: Blätter der Erinnerung, 1898, with portrait. Schultze: Necrology, by Schwalbe in _Archiv f. Mik. Anat._, vol. 10, 1874, with portrait. Schultze's paper founding the protoplasm doctrine in _Archiv f. Anat. und Phys._, 1861, entitled Ueber Muskelkörperchen und das was man eine Zelle zu nennen habe.