1 2 INTR OD UC TION 



ure, and the second to the phenomena of cell-division. The follow- 

 ing three chapters deal with the germ-cells, the third with their 

 structure and mode of origin, the fourth with their union in fertiliza- 

 tion, the fifth with the phenomena of maturation by which they are 

 prepared for their union. The sixth chapter contains a critical dis- 

 cussion of cell-organization, completing the morphological analysis of 

 the cell. In the seventh chapter the cell is considered with reference 

 to its more fundamental chemical and physiological properties as a 

 prelude to the examination of development which follows. The suc- 

 ceeding chapter approaches the objective point of the book by con- 

 sidering the cleavage of the ovum and the general laws of cell-division 

 of which it is an expression. The ninth chapter, finally, deals with 

 the elementary operations of development considered as cell-functions 

 and with the theories of inheritance and development based upon 

 them. 



SOME GENERAL WORKS ON THE CELL-THEORY 



Bergh, R. S. Vorlesungen liber die Zelle imd die einfachen Gewebe : Wiesbaden, 



1894. 

 Delage, Yves. La Structure du Protoplasma et les Theories sur Theredite et les 



grands Problemes de la Biologic Generale : Paris, 1895. 

 Geddes & Thompson. The Evolution of Sex : New York, 1890. 

 Henneguy, L. F. Lecons sur la cellule : Paris. 1896. 



Hertwig, 0. Die Zelle und die Gewebe: Fischer. Jena, 1892. Translation, pub- 

 lished by Macmillan, London and New York, 1895. 

 Huxley, T. H. Review of the Cell-theory: British and Foreign Medico-Chirurgical 



Review, XII. 1853. 



Minot, C. S. Human Embryology: New York, 1892. 

 Remak, R. Untersuchungen liber die Entwicklung der Wirbelthiere : Berlin, 



1850-55. 

 Schleiden, M. J. Beitrage zur Phytogenesis : Mailer's Archiv, 1838. Translation 



in Sydenham Soc., XII. London. 1847. 

 Schwann, Th. Mikroscopische Untersuchungen liber die Uebereinstimmung in 



der Structur und dem Wachsthum der Thiere und Pflanzen : Berlin. 1839. 



Translation in Sydenham Soc., XII. London, 1847. 

 Tyson, James. The Cell-doctrine, 2d ed. Philadelphia, 1878. 

 Virchow, R. Die Cellularpathologie in ihrer Begrlindung auf physiologische und 



pathologische Gewebelehre. Berlin, 1858. 

 Weismann, A. Essays on Heredity. Translation: First series, Oxford, 1891; 



Second series, Oxford, 1892. 

 Id. The Germ-plasm. New York, 1893. 



