328 LECTURE XIV. 



It may be repeated, in conclusion, that the loss in the 

 economy of the plant is, under ordinary circumstances, much 

 less considerable than the income : as a consequence the 

 plant continues to gain in weight and to accumulate potential 

 energy. 



In the remaining lectures we shall consider the mechanisms 

 of growth and of movement, and the physiology of reproduc- 

 tion. The next lecture will be devoted to the subject of 

 Growth. 



BIBLIOGRAPHY. 



Hermann ; Physiology (English edition by Gamgee), 1875, P- 2I 7- 

 Growth : 



Strasburger; Bau und Wachsthum der Zellhaute, 1882. 



Malpighi; Opera Omnia, I, p. 108, 1687. 



Se'ne'bier; Physiologic Ve'ge'tale, in, 1800. 



de Saussure; Recherches chimiques, 1804. 



Detmer ; Landw. Jahrb., XI, 1882. 



Wortmann ; Arb. d. bot. Inst. in Wiirzburg, n, 1880. 



Pasteur ; Etudes sur la Biere, 1876 ; Comptes rendus, 1861, Lil, 1863, 



LVI, 1872, LXXV, 1875, LXXX. 

 Brefeld ; Landw. Jahrb., V, 1876. 

 Naegeli ; Theorie der Gahrung, 1879. 



Pasteur ; Comptes rendus, Lil, 1861 ; Etudes sur la Biere, p. 293. 

 Prazmowski ; Unters. ueb. Bakterien, Leipzig, 1880. 

 Koppen ; Warme und Pflanzenwachsthum, Moscow, 1870. 

 de Vries ; Archives Ne'erlandaises, V, 1870. 

 Pfeffer; Physiologic, II, 1881. 



Sachs ; Text-book, 2nd English edition, 1882, p. 831. 

 A. de Candolle; Bibliotheque universelle, xxiv, Geneva, 1865. 

 Rischawi and Mayer ; Landw. Versuchsstat., XIX, 1876. 



Movement : 



Dutrochet; Mdmoires, I, 1837, p. 561. 



Kabsch ; Bot. Zeitg., 1862. 



Pfeffer; Physiologic, I, p. 383, 1881. 



Kiihne ; Protoplasma, 1 864. 



Engelmann ; Bot. Zeitg., 1882 and 1883; Pfliiger's Archiv, XXVI, 



1881. 



Grossman and Mayerhausen ; Pfliiger's Archiv, XV, 1877. 

 Velten ; Flora, 1876. 



