58 
Id. 
) 
zi 
BOTANICAL GAZETTE [SEPTEMBER 
HILLEBRAND, W. F., The on g silicate and carbonate rocks. U.S. 
Geol. Survey Bull. 422. 1-230. 
. JARDINE, W. M., and Catt, L. E. "Alfalfa i in Kansas. Kan. Agric. Exp. 
Sta. Bull. 197. be-Bioe IQ14. 
. Kocu, F. C., Lecture and laboratory notes in tissue analysis. Course 37 
in Department of Physiological Chemistry at the University of Chicago. 
d 
. Kraus, E. J., and Kraysrtr, H. R., Vegetation and reproduction with 
re reference to the tomato. Oregon Agric. Exp. Sta. Bull. 149. 1-90. 
g18. 
‘ Evoke T. L., and Bizzett, J. A., Lysimeter experiments. Cornell Agric, 
Exp. Sta. Mekioir 12. I-II 
; 1OTS, 
. MacIntrre, W. H., Wiis, L. G., and Hotpine, W. S., The divergent 
il 
effects of lime and aged upon the conservation of soil sulphur. So 
Science 4 :231-235. 1917. 
. Mass. Agric. Exp. Sta. Rep. 1914 (pp. 157, 1 
. Methods of Analysis of the Association of Official Agricultural Chemists. 
Washington. 1920. 
. Mitter, H. G., Relation of sulphates to plant growth and composition. 
Jour. Agric. Re: 17 :87-102. 1919. 
Otson, G. A., and St. Joun, J. L., An investigation of sulphur as a plant 
food. Wash. ante Exp. Sta. Bull. 165. 1-69. figs. 11. 1921. 
Pr1z, W. J., Effects of elemental sulphur and of ealaus sulphate on 
plant life. Jour. Agric. Res. 5:771-780. 1916. 
. Remer, F. C., and Tartar, H. V., Sulphur as a fertilizer for alfalfa in 
southern Oregon. Oregon Agric. Exp. Sta. Bull. 163. 1-40. 1919 
. Roprnson, W. O., The inorganic alas % some important American 
soils. U.S. Dept. Agric. Bull. 122. 1-27. 
RoBINsON, W. O., STEINKOENIG, G. A., Hes Fay, W. H., Variation in the 
chemical compouition of soils. U.S. Dept. Agric. Bull. 551. I-16. 1917. 
SHEppD, O. M., The sulphur content some typical Kentucky soils. Ky. 
Agric. Exp. Sta. Bull. 174. 213-250. 1913 
, The relation : sulphur to ae fertility. Ky. Agric. Exp. Sta. 
Bull. 188. 595-630. 19 
. Scuertz, F. M.,A hac and physiological study of mottling of leaves. 
Bor, Gaz. 71: 81-131. 1921. 
. Swanson, C. O., and MItter, R. W., The sulphur content of some typical 
Kansas soils and the loss of sulphur due to cultivation. Soil Science 
3 3139-148. 1917. 
TortincHam, W. E., Effect of spied: of ate supply on plant growth. 
Wis. Agric. Exp. Sta. Bull. 228. 26. 
