3/0 LECTURE XV. 



Nageli ; Pflanzenphysiol. Unters., Die Starkekorner, 1858, p. 328; 



also Das Mikroskop, 1877. 

 Strasburger ; loc. cit. 



2. Structure and Properties of Growing Organs. 



Sachs ; Text-book, p. 819 (2nd English edition). 



Sachs ; Flora, 1873. 



Askenasy ; Verhandl. d. naturhist.-med. Vereins zu Heidelberg, II, 



1880. 



Sachs ; Text-book, p. 820. 



Stebler; Pringsheim's Jahrb. f. wiss. Bot, XI, 1878. 

 Sachs ; Text-book, p. 784 (also de Vries, Arb. d. bot. Inst. in Wiirz- 



burg, i, 1874). 

 Prillieux ; Ann. d. sci. nat, sdr. 4, IX, 1868. 



3. Tensions in Growing Organs. 



Sachs; Text-book, p. 799; also Experimental Physiologie, 1865, 



p. 465. 

 Kraus; Bot. Zeitg., 1867. 



4. Influence of the Tensions upon the Growth of the Cells. 



Strasburger; loc. cit., p. 180. 



Reess; Bot. Zeitg., 1868. 



Strasburger; loc. cit., p. 178. 



de Vries; Flora, 1872. 



Detlefsen ; Arb. d. bot. Inst. in Wiirzburg, n, 1882. 



Knight; Roy. Soc., 1803. 



Sachs ; Text-book, p. 860. 



Kraus ; Pringsheim's Jahrb. f. wiss. Bot., VII, 186970. 



Braun ; Sitzber. d. k. Akad. in Berlin, 1854. 



de Vries ; Bot. Zeitg., 1879. 



5. The Grand Period of Growth in Length. 

 Sachs ; Text-book, p. 818. 



Sachs; Text-book, p. 819; also Arb. d. bot. Inst. in Wiirzburg, I, 



1874, p. 99. 



Baranetzky ; Mdmoires de 1'acad. imp. de St Petersburg, xxvn, 1879. 

 Drude ; Nova Acta d. k. Leop.-Carol. Akad., XLIII, Halle, 1881. 



Nutation. 



Baranetzky ; Me'moires de 1'acad. imp. de St Petersburg, XXXI, 1883. 



Darwin ; The Power of Movement of Plants, 1880. 



Darwin ; The Movements and Habits of Climbing Plants, 1875. 



de Vries ; Arb. d. bot. Inst. in Wiirzburg, I, 1874, p. 252. 



Darwin ; Movements of Plants. 



Wortmann ; Bot. Zeitg., 1882. 



Wiesner ; Sitzber. d. k. Akad. in Wien, LXXVII, 1878, and LXXXVIII, 



1883. 



Sachs ; Text-book, p. 857. 

 Wortmann ; loc. cit. 



Vochting; Die Bewegungen der Bluthen und Friichte, 1882, p. 186. 

 Mayer ; Landwirthsch. Versuchsstat., xvm, 1875. 



