26, 1904. CHAPTER XI The Cell-Doctrine by Tyson, 1878. The Cell-Theory, Huxley, _Medico-chir. Review_, 1853, also in Scientific Memoirs, vol. I, 1898; The Modern Cell-Theory, M'Kendrick, _Proc. Phil. Soc. Glasgow_, vol. XIX, 1887; The Cell-Theory, Past and Present, Turner, _Nature_, vol. 43, 1890; The Cell-Doctrine, Burnett, _Trans. Am. Med. Assn._, vol. VI, 1853; First illustration of cells in Rob't Hooke's Micrographia, 1665, 1780, etc.; The Cell in Development and Inheritance, Wilson, 1896; Article Cell, in Chambers's (New) Cyclopædia, by Thomson. Schleiden: Sketch of, _Pop. Sci. Mo._, vol. 22, 1882-1883; Sachs' Hist. of Botany 1890; Translation of his original paper of 1838 (Ueber Phytogenesis)--illustrations--Sydenham Soc., 1874. Schwann: Life, _Pop. Sci. Mo._, vol. 37, 1900; Sa Vie et Ses Travaux, Frédéricq, 1884; Nachruf, Henle, _Archiv f. Mik. Anat._, vol. 21, 1882; Lankester, _Nature_, vol. XXV, 1882; _The Practitioner_, vol. 49, 1897; _The Catholic World_, vol. 71, 1900. Translation of his contribution of 1839 (Mikroscopische Untersuchungen ueber die Uebereinstimmung in der Structur und dem Wachstum der Thiere und Pflanzen), Sydenham Soc., 1847. 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with portraits and other illustrations, Joubin, _Archives de Parasitol._, vol. 4, 1901; portrait of Dujardin hitherto unpublished.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. CHAPTER XIII