Apr. 9,1917 
Water-Retaining Capacity of Soil 
7 i 
(18) Mason, S. C. 
19x1. Drought resistance of the olive in the southwestern states. U. S. Dept. 
Agr. Bur. Plant Indus. Bui. 192, 60 p., 20 fig., 6 pi. 
(19) Mitschbrlich, E. A. 
1905. Bodenkunde fur Land- und Forstwirte. 364 p., 38 fig. Berlin. 
( 20 ) - 
1913. Bodenkunde fiir Land- und Forstwirte. Aufl. 2,317 p., 35 fig. Berlin. 
(21) Ramann, E. 
1911. Bodenkunde. Aufl. 3, 619 p., 3 fig., 2 pi. Berlin. 
(22) Rice, T. D., et al. 
1913. Reconnoissance survey of western Nebraska. U. S. Dept. Agr. Bur. 
Soils, Adv. Sheets—Field Oper. 1911, 121 p., 2 fig., 1 pi., map. 
(23) Rotmistrov, V. G. 
1913. The Nature of Drought According to the Evidence of the Odessa Experi¬ 
ment Field. 48 p., 20 fig. Odessa. 
(24) Tulaikow, N. 
1907. Einige Laboratoriums-Versuche fiber die Kapillaritat der Boden. 
(Abstract.) In Zhur. Opuitn. Agron. (Russ. Jour. Exp. Landw.), 
t. 8, kniga 6, p. 664-666. 
(25) Widtsoe, J. A., and McLaughlin, W. W. 
1912. The movement of water in irrigated soils. Utah Agr. Exp. Sta. Bui. 115, 
p. 195-268, illus. , 
