in SCENT OF SAP IN STEMS 79 



Crucial experiments have failed to show directly the 

 presence of vital sap-lifting forces. 



Experiments have abundantly shown that even when 

 the vital activities of the cells of the wood have been 

 eliminated, water under the action of purely physical 

 forces rises in the stems of high trees. 



Literature. 



Biot, J. B., "Remarques scientifiques a l'occasion de la lettre de M. 

 Boucherie inseree au dernier numero du Compfce rendu," Compt. rend., 1841, 

 T. 12, p. 357. 



Boucherie, " Rapport sur une memoire de M. le docteur Boucherie relatif 

 a la conservation des bois," Compt. rend., 1840, T. 11, p. 894. 



Dixon, H. H., "Physics of the Transpiration Current," Notes from the 

 Botanical School of Trinity College, Dublin, vol. i, p. 57. 



Id., "Transpiration and the Ascent of Sap," Progressus Rei Botanicae, 

 1909, Bd. iii, s. 1. 



Id., "Note on the Supply of Water to Leaves on a Dead Branch," Proc. 

 Roy. Dublin Soc, 1905. vol. xi. (N. S.) p. 7. 



Id., "Vitality and the Transmission of Water through the Stems of 

 Plants," Proc. Roy. Dublin Soc, 1909, vol. xii (N. S.), p. 21, and Notes 

 from the Botanical School of Trinity College, Dublin, vol. ii, p. 5. 



Id., "Note on the Spread of Morbid Changes through Plants from 

 Branches killed by Heat," Proc. Roy. Dublin Soc, 1914, vol. xiv (N. S.), 

 p. 205. 



Id., "Changes produced in the Sap by the Heating of Branches," Proc. 

 Roy. Dublin Soc, 1914, vol. xiv (N. S.) p. 224. 



Ewart, A. J., "The Ascent of Water in Trees," Phil. Trans. Roy. Soc 

 London, 1905, vol. 108 B, and 1908, vol. 199 B, p. 362. 

 * Id., "Protoplasmic Streaming." Oxford, 1903. 



Godlewski, E., "Zur Theorie der Wasserbewegung in den Prlanzen," 

 Jahrb.f. Wiss. Bot, 1884, Bd. 15, s. 569. 



Hartig, R., " Ueber die Vertheilung der organischen Suhstanz, des 

 Wassers und des Luftraumes in den Baumen und uber die Ursache der 

 Wasserbewegung in transpirirenden Prlanzen," Untersucliuivjen aus d. 

 Forst. Bot. Inst, m Miinchen, ii and iii, 1882-1883. 



Janse, J. M., "Die Mitwirkung der Markstrahlen bei Wasserbewegung 

 im Hulz," Jahrb.f. Wiss. Bot., 1887, Bd. 18, s. 1. 



Id., "Der Aufsteigende Strom in der Pflanze, I.," Jahrb. f. Wiss. Bot., 

 1908, Bd. 45, s. 305. 



Id., "Der Aufsteigende Strom in der Pflanze, II.," Jahrb. f. Wiss. Bot., 

 1913, Bd. 52, s. 509. 



Id., "Die Wirkung des Protoplasten in den Zellen welche bei der 

 Wasserbewegung beteiligt sind," Jahrb. f. Wiss. Bot., 1913, Bd. 52, s. 603. 



