INDEX. 81 



Page. 

 Formulas, measurement of moisture retentivity, relationships. . 58, 65, 68, 69, 72-73, 77 

 Free, E. E., on wilting point of plants 23 



Gain, E., on relative wilting points for different plants 7 



Gallagher, F. E., and Cameron, F. K., on Heinrich's hygroscopic moisture 



determinations 66 



Glass pots. See Pots. 



Grasses, determinations of wilting coefficient 21, 22, 35-38, 43, 44, 75 



Greenhouse, use in determining wilting coefficient 14, 22-23, 54-55 



Grindelia squarrosa, determinations of wilting coefficient 37, 45 



Hedgcock, G. G., on relative wilting points for different plants 7 



Heinrich, R., on wilting-point determinations 7, 65 



Hepatica triloba, comparison with wheat by simultaneous culture 46 



Heteranthera reniformis, comparison with wheat by simultaneous culture. .... 46 



Hilgard, E. W., on moisture content of soils 64, 67 



Humidity, influence on wilting coefficient 15, 22-23, 55 



Hydrophytes, determinations of wilting coefficient 22, 35, 37 



Hygroscopic coefficient. See Coefficient, hygroscopic. 



Introduction to bulletin 7-8 



Isoetes sp., determinations of wilting coefficient 35, 37, 45, 75 



Japan rice. See Rice. 



Juncus balticus, determinations of wilting coefficient 37, 45 



Kafir, determinations of wilting coefficient 36, 40 



Kowliang, determinations of wilting coefficient 36, 40 



Kubanka wheat. See Wheat. 



Leaves of plants, relation to wilting-coefficient determinations. . . 8-9, 23, 35, 39-46, 54 



Legumes, determinations of wilting coefficient 35-38, 47, 75 



See also plant names; as, Alfalfa, Vetch, etc. 



Lemon, determinations of wilting coefficient 27, 32, 37, 51 



Lettuce, determinations of wilting coefficient 37. 45 



Light. See Sunlight. 



Livingston, B . E . , on wilting point of plants 23 



Loughridge, R. H., on moisture-holding capacity of soils 67 



Lupinus pusillus, determinations of wilting coefficient 37, 45 



McLane, J. W., and Briggs, L. J., on moisture equivalent of soils 56, 68, 72 



determinations of moisture equivalents 57, 64 



Martin, 0. F., Pearce, J. R., and Briggs, L. J., on the mechanical analyses of 

 soils 68 



Measurements of moisture retentivity. See Retentivity. 

 Mechanical analysis. See Analysis, mechanical. 



Melilotus alba, determinations of wilting coefficient 37, 44 



Mesophytes, determinations of wilting coefficient 22, 35, 37 



Method, balancing. See Balance. 

 wax-seal. See Wax. 



Methods, indirect, of determining wilting coefficient 8, 56-73 



of comparing wilting coefficients. See Culture, simultaneous. 



determining wilting coefficient 8, 10-25, 47-53, 56-73 



See also Balance, Formulas, and Wax. 



Millet, determinations of wilting coefficient 22, 35-38, 40, 75 



8477°— Bui. 230—12 6 



