[VoL. 7 
48 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Heald, F. D. (96). On the toxic effect of dilute solutions of acids and salts upon 
plants. Bot. Gaz. 22: 125-153. pl. 7. 1896 
Hoagland, D. R. (17). The effect of hydrogen and hydroxyl ion concentration on 
the growth of barley seedlings. Soil Science 3: 547-560. 
, (18). The relation of the plant to the reaction of the ‘nutrient solution. 
Science N. S. 48: 422-425. 1918. 
, (19). Relation of the concentration and reaction of the nutrient medium 
to the growth and absorption of the plant. Jour. Agr. Res. 18: 73-117. f. 1-4, 
1919. 
Kahlenberg, L., and True, R. H. (96). On the toxic action of dissolved salts and 
their electrolytic dissociation. Bot. Gaz. 22: 81-124. 
Livingston, B. E., and Tottingham, W. E. (18). A new three-salt nutrient solution 
for plant cultures. Am. Jour. Bot. 5: 337-346. 1918. 
Loew, F. A. (03). The toxic effect of H- and OH-ions on seedlings of Indian corn. 
Science N. S. 18: 304-308. 1903. 
McCall, A. G. (15). A new method for the study of plant nutrients in sand cultures. 
Am. Soc. Agron. Jour. 7: 249-252. 
, (16). Physiological balance of nutrient solutions for plants in sand cul- 
tures. Soil Science 2: 207-254. f. 1-8. 1916. 
—————, Norton, J. B. S., and Richards, P. E. (19). Abnormal stem growth of 
soy beans in sand eultures with Shive's three-salt solution. Ibid. 6: 479-481. 
pl. 1-2. 1919. 
Miyake, K. (14). Ueber die Wirkung von Sáuren, Alkalien und einiger alkali Salze 
auf dem Wachstum der Reispflanzen. Sapporo Nat. Hist. Soc., Trans. 5: 
91-95. 1914. 
Pantanelli, E. (15). Über Ionenaufnahme. Jahrb. f. wiss. Bot. 56: 689-733. 1915. 
Mig J. K. (18). Studies in soil reaction as indicated by the hydrogen elec- 
rode. Jour. Agr. Res. 12: 19-31. 1918. 
med C. L. A., and Hoagland, D. R. (19). Table of Psa, H+, and OH-values 
erresponding to electromotive forces determined in hydrogen electrode meas- 
urements, with a bibliography. Univ. Calif. Publ., Physiol. 5: 23-69. 1919. 
Schreiner, O., and Skinner, J. J. (10). Ratio of phosphate, nitrate, and potassium 
on beis and growth. Bot. Gaz. 50: 1-30. f. 1-9. 1910. 
— ———, —————, (10a). Some effects of a harmful organic soil constituent. 
Ibid. 5o: 161- 181. f. 1-11. 1910. (See also U. S. Dept. Agr., Bur. Soils Bul. 
70:1-98. pl.1-4. f.1-31. 1911.) 
— ———, ——— (11). Organic compounds and fertilizer action. U. S. Dept. 
Agr., Bur. Soils Bul. 77: 1-31. f. 1-5. 1911 
— ———, ————, (12). The toxic action of organic compounds as modified by 
fertilizer salts. Bot. Gaz. 54:31-48. f. 1-5. 1912. 
Sharp, L. T., and Hoagland, D. R. (16). Acidity and absorption in soils as measured 
by the hydrogen electrode. Jour. Agr. Res. 7: 123-145. Jod. 16. 
Shive, J. W. (15). A study of physiological balance in nutrient media. Physiol. 
Res. 1: 327-397. f.1-15. 1 
————, ('15a). A three-salt nutrient solution for plants. Am. Jour. Bot. 4: 
157-160. 1915 
