[Vol. 2 



496 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Bouyoucos, G. ('12). Transpiration of wheat seedlings as affected by different 



densities of a complete nutrient solution in water, sand, and soil cultures. 



Beih. z. bot. Centralbl. 29 1 : 1-20. f. S. 1912. [See pp. 14-15.] 



Copeland, E. B., and Kahlenberg, L. ('99). The influence of the presence of pure 

 metals upon plants. Wis. Acad. Sci., Trans. 12:454-474. 1899. 



Dachnowski, A. ('08). The toxic property of bog water and bog soil. Bot. Gaz. 

 46:130-143. f. 1-6. 1908. 



, ('09). Bog toxins and their effect upon soils. Ibid. 47: 389-405. 



f. 1-2. 1909. 



, ('12). Peat deposits of Ohio, their origin, formation, and uses. Ohio 



Geol. Survey, 4th §er. Bui. 16 : 1-424. pi. 1-8. f. 1-29. 1912. [See pp. 

 307-342.] 



Deh6rain, P. P. ('78). Sur l'assimilation des substances min^rales par les plantes. 

 Ann. Agron. 4:321-349. 1878. [See pp. 334-345.] 



, et Demoussy, E. ('01). Sur la germination dans l'eau distill6e. Compt. 



rend. acad. Paris 132:523-527. 1901. 



Dixon, H. H., and Atkins, W. R. G. ('13). Osmotic pressures in plants. -II. 

 Cryoscopic and conductivity measurements on some vegetable saps. Roy. 

 Dublin Soc, Sci. Proc. N. S. 13:434-440. 1913. 



, , ('13a). Osmotic pressures in plant-organs. III. The osmotic 



pressure and electrical conductivity of veast, beer, and wort. Ibid. 14 : 9-12. 

 1913. 



Findlay, A. ('10). Practical physical chemistry. London, 1910. [See pp. 

 144-181.] 



Frank, B. ('88). Untersuchungen iiber die Erniihrung der Pflanze mit Stickstoff 

 und iiber den Kreislauf desselben in der Landwirthschaft. Landw. Jahrb. 

 17 : 421-553. pi 10-13. 1888. [See p. 535.] 



Gardner, F. D. ('98). The electrical method of moisture determination in soils: 

 results and modifications in 1897. U. S. Dept. Agr., Div. Soils, Bui. 12 : 1-24. 



pi. 1-3. f. 1. 1898. 



Heald, F. D. ('02). The electrical conductivity of plant juices. Bot. Gaz. 34: 

 81-92. /. 1-2. 1902. 



Hoyt, W. D. ('13). Some toxic and antitoxic effects in cultures of Spirogyra. 

 Torr. Bot. Club, Bui. 40:333-352. 1913. 



Jones, H. C. ('09). The elements of physical chemistry. New York, 1909. [See 

 p. 377 ff.] 



Kahlenberg, L., and True, R. H. ('96). On the toxic action of dissolved salts and 

 their electrolytic dissociation. Bot. Gaz. 22:81-124. 189(3. 



Robert, R. ('05). Einiges Medizinische iiber das Wasser. Zeitschr. f. Kranken- 

 pfiege 27: 377-384. 1905. 



Koeppe, H. ('98). Reines Wasser, seine Giftwirkung und sein Vorkommen in der 

 Natur. Deut. med. Wochenschr. 24:G24-62G. 1898. 



Kolliker, A. ('56). Ueber die Vitalitat der Nervenrohren der Frosche. Wiirz- 

 burger Verhandl. 7: 145-147. 1856. 



Livingston, B. E., Britton, J. C, and Reid, F. R. ('05). Studies on the prop- 

 erties of an unproductive soil. U. S. Dept. Agr., Bur. Soils, Bui. 28 : 1-39. 

 1905. 



