Conductivity under Geotropic Stimulation. 363 



[April 19, 1918. — Experiments with the galvanometer have been carried 

 out in Dr. Waller's laboratory, but the results with that apparatus were 

 vitiated by a temperature effect due to the moist, non-polarisable electrodes 

 used. It is important, however, that the subjective Kohlrausch method 

 should be supplemented by an objective method, and the writer hopes to 

 develop a suitable apparatus for the necessary confirmation of the results 

 given above.] 



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(2) Bose, M. (J., ' De Motu Plantarum Sensus Aemulo,' Leipzig, 1729. 



(3) Fitting, H., " Untersuchungen iiber geotropischen Eeizvorgang," ' Teil I u. II. 



Jahrbuch. f. wiss. Botanik,' vol. 41 (1905). 



(4) Hunter, C, "The Aerating System of Vicia Faha^' 'Ann. Bot.,' vol. 29 (1915). 



(5) McClendon, J. F., " The Increased Permeability of Striated Muscle to Ions 



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(6) Osterhout, W. J. V., (a) " Antagonism and Weber's Law," ' Science,' N.S., vol. 44, 



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(7) Sachs, J. v., ' Physiology of Plants ' (Eng. trans.), 1887. 



(8) Trondle, A., " Ueber Physiologische Variabilitat," ' Bericht. Natur. Gesell. Frei- 



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(9) Waller, A. D., (a) "Points relating to the Weber-Fechner Law," 'Brain,' p. 205 



(1895) ; (6) "On the Excitability of Nervous Matter," 'Brain,' 1900 ; (c) 'The 

 Signs of Life,' London, 1903. 

 (10) Weber, E. H., ' De Tactu : Annotationes anatomicse et physiologicae,' Leipzig, 1851. 



BIBLIOGRAPHY. 



VOL. XC. — B, 



2 G 



