INDEX 



421 



Bouyoucos, G. J., time for heat to 



penetrate soil. 30( 

 Briggs, L. J., ratio between viscosity 



and How of water, 219 

 thickness of hygroscopic film, 



194 



Briggs, Martin, and Pearce, Bureau 

 of Soils, sizes of particles, 

 124 



chromic acid method of deter- 

 mining organic matter, 154 

 Briggs and Me La no. moisture equiv- 

 alent centrifuge, 202 

 Briggs and Sliant/., water require- 

 ment of plants, Akron, 

 Colorado, 242 

 wilting coefficient, 212 



determination of, 107 

 Brown, E. K., with Schreiner, ()., 



progress of humitication, 14(> 

 Brown, 1'. K., bacteria per gram <>f 



air-dry soil, .SI!) 

 Brownian movement, 130 

 Buckingham, little loss of water by 



interstitial evaporation, 232 

 Bureau of Soils 



centrifugal method of physical 



analysis, 127 

 classification of soils, chapter 



on, 7H 



grades of soil particles. 124 

 provinces, soil 



Appalachian Mountain and 



Plateau, SI 

 Atlantic, and (!ulf Coastal 



Plains, ill 



(Macial and l.ocssial, 84 

 (ilacial Ijikc and River Ter- 

 race, 8! 

 Limestone Valleys and I'p- 



lands, S3 



Piedmont Plateau, 7!> 

 Kiver Flood Plains, 97 

 regions, soil 



Arid Southwest. 10<i 

 (.rent Basin, 10I 

 (Jrcat Plains. 100 

 Northwest Intel-mountain, 



105 



Pacific Coast, 107 

 Rocky Mountains, 101 

 series, soil 



Aeadia. 92 

 Alamancc. 7!> 

 Altamont, 107 



Bureau of Soils, 

 series, soil 



Amarillo, 103 

 Arkansas, 104 

 Bangor, 84 

 Bates, 100 

 Benton, 101 

 Berks, 81 

 Bibb, 97 

 Billings, 105 

 Bingham, 100 

 Blanco, 97 

 Boise, 105 

 Boone, 101 

 Brennan, 92 

 Brooks, 83 

 Caddo, 92 

 Cahaba. 97 

 Caldwell, 106 

 C'ameron, 97 

 Canyon, 102 

 CarilM>u, 84 

 Carrington. 84 

 Ca/enovia, 85 

 Cecil, 79 

 Chehalis, 110 

 Chenango, 89 

 Chester. 80 

 Cheyenne, 104 

 Clark, 101 

 Clarksville, 83 

 Clyde. 89 

 Colbert, 83 

 Colby, 102 

 Coloma, 85 

 Colorado, 103 

 Conasauga, 81 

 Conestoga. 83 

 Conga rec. !7 

 Corning, 107 

 Cossaymna. 85 

 Coxvi'lle. 92 

 Crawford. 101 

 Crowley. 93 



Dawes. 1 03 



Decatur. S3 

 DeKalb. SJ 

 Dunkirk. 90 

 Durham. SO 

 Dutches*. 85 

 Duval, 93 

 Durant. 93 

 Kdna. 93 

 Klktou. 93 



