LITERATURE 389 



stimulated condition persists for some time after irritation, so 

 that a summation of effects may occur. An acclimatization to 

 contact may appear, when no response is invoked by the irrita- 

 tion. The thigmotropic response may be explained, in general, 

 as due to a chemical change, wrought by the one-sided impact, 

 such as to cause a disturbance in the equality of the growth 

 processes assimilation, secretion, or imbibition on the two 

 sides of the organ. 



LITERATURE 



BARANETZKY, J. '79. Die tagliche Periodizitat im Langenwachsthum der 



Stengel. Mem. de 1'Acad. de St. Petersb. XXVII. 91 pp. 

 BUCHNER, H. '80. Ueber die experimentelle Erzeugung des Milzbrand- 



contagiums aus den Heupilzen. Sb. k. bayer. Akad. Miinchen. X, 



368-413. 

 CIESIELSKI, T. '72. Uritersuchungen iiber die Abwartskriimnmng der 



Wurzel. Beitrage zur Biologie der Pflanzen. Band I, Heft II. pp. 



1-30. Taf. I. 

 DARWIN, C. '65. On the Movements and Habits of Climbing Plants. Jour. 



Linn. Soc. (Bot.). IX, 1-118. 

 '82. The Movements and Habits of Climbing Plants. 208 pp. 3d 



thousand. London, 1882. [Date of first edition, 1875.] 

 DARWIN, C. and F. '81. The Power of Movement in Plants. 592 pp. New 



York, 1881. 



DETLEFSEN, E. '82. (See Chapter XII, Literature.) 

 DUTROCHET, II. '43. Des mouvements revolutifs spontanes qui s'observent 



chez les vegetaux. Ann. Sci. Nat. XX (Bot.), 306-329. 

 '44. Recherches sur la volubilite des tiges de certains vegetaux et sur la 



cause de ce phenomene. Ann. Sci. Nat. II (Bot.), 156-167. 



, L. '84. Die grosse Wachsthumsperiode bei den Fruchttragern von 



Phycomyces. Bot. Ztg. XLII, Nos. 32 to 36. Aug., Sept. 1884. 

 HEGLER, R. '93. Ueber den Einfluss des mechanischen Zugs auf das 



Wachsthum der Pflanze. Beitrage z. Biol. d. Pflanzen. VI, 383-432. 

 HORVATH, A. '78. (See Chapter IV, Literature.) 

 JONSSON, B. '83. (See Chapter IV, Literature.) 

 LEONE, T. '85. Sui microorganism! delle acque potabili. Atti della R. 



Accad. Lincei (4) Rencond. I. 

 LOEB, J. '91. Untersuchungen zur physiologischen Morphologic der Thiere. 



I. Ueber Heteromorphose. Wiirzburg, 1891. 

 '92. (See Chapter X, Literature.) 

 MACDOUGAL, D. T. '96. The Mechanism of Curvature of Tendrils. Ann. 



of Bot. X, 373-402. April, 1896. 

 MELTZER, S. J. '94. (See Chapter IV, Literature.) 



