37^ Journal of Agricultural Research voi. xviii, No. 7 



(8) McCall, a. G. 



1915. A NEW METHOD FOR THE STUDY OF PLANT NUTRIENTS IN SAND CULTURES. 



In Jour. Amer. Soc. Agron., v. 7, no. 5. p. 249-252. 



(9) 



19 16. THE PHYSIOLOGICAL BALANCE OF NUTRIENT SOLUTIONS FOR PLANTS IN 



SAND CULTURES. In Soil Sci., v. 2, no. 3, p. 207-253, 8 fig. Literature 

 cited, p. 251-253. 



(10) McCooL, M. M. 



19 13. THE ANTITOXIC ACTION OF CERTAIN NUTRIENT AND NON-NUTRIENT BASES 



WITH RESPECT TO PLANTS, /n N. Y. Cornell Agr. Exp. Sta. Mem. 2, p. 113- 

 170, fig. 1-8. Bibliography, p. 166-170. 



(11) ScHREXNER, Oswald, and Skinner, J. J. 



1918. The TRIANGLE SYSTEM FOR FERTILIZER EXPERIMENTS. In Jour. Amer. 

 Soc. Agron., v. 10, no. 6, p. 225-246, fig. 28-41, pi. 5-7. 



(12) Shive, J. W. 



I915. A STUDY OF PHYSIOLOGICAL BALANCE IN NUTRIENT MEDIA. In Physiol. 



Researches, v. 1, no. 7, p. 327-397, 15 fig. 



(13) 



1917. A STUDY OP PHYSIOLOGICAL BALANCE FOR BUCKWHEAT GROWN IN THREE- 

 SALT SOLUTIONS. N. J. Agr. Exp. Sta. Bui. 319, 63 p., 13 fig. Literature 

 cited, p. 63. 



(14) 



1918. A COMPARATIVE STUDY OF SALT REQUIREMENTS FOR YOUNG AND FOR 

 MATURE BUCKWHEAT PLANTS IN SAND CULTURES. In Soil Sci., V. 6, no. I, 



p. 1-32, 3 fig. References, p. 32. 



(15) ToTTiNGHAM, William. 



1914. A QUANTITATIVE CHEMICAL AND PHYSIOLOGICAL STUDY OF NUTRIENT 



SOLUTIONS FOR PLANT CULTURES. In Physiol. Researches, v. i, no. 4, p. 

 133-245, 15 fig. Literature cited, p. 242-245, 



