SOILS FERTILIZERS. 417 



of related soils, using a different set of coefficients. It is interesting to note 

 that the organic matter, for tlie force employed, has a retentive power no greater 

 than the clay group. 



'■ In investigating the influence of the speed upon tlie moisture equivalent it 

 was found, for the series of soils examined, that between certain limits the 

 amount of moisture set free when the pulling force is increased by a definite 

 amount is the same for the different soils. In other words, when this series of 

 moist soils is in equilibrium with a given force, and the force is then increased 

 by a definite amount, the amount of water set free is independent of the initial 

 water content. Within these limits, then, a sandy soil and a heavy soil of this 

 series part with equal amounts of moisture." 



Soil fertility, ]M. Whitney {La FertUite dn i^ol. MontpclUcr, J 907, pp. o2, 

 figs. 2). — A Fi-ench translation of Farmers' Bulletin 257 of this Department 

 (B. kS. Pw., 18, p. Ill)), by H. Fabre, of the National School of Agriculture of 

 Montpellier. 



Field operations of the Bureau of Soils, 1905 (seventh, report), M. Whit- 

 ney ET AL. (U. 8. Dcpt. Agr., Field Opvnitions of the Barcnu of 8oUs, 190.'). 

 pp. 1089, pis. 2, figs. Jf5, maps .'/7). — This report contains a general review of 

 the work of the Bureau of Soils during 1905, by the Chief of the Bureau, to- 

 gether with detailed accounts of the following surveys: 



Tompkins county, N. Y., by J. A. Bonsteel, E. O. Fippin, and W. T. Carter, 

 jr. ; the Binghamton area, N. Y., by E. O. Fippin and W. T. Carter, jr. ; Mont- 

 gomery county, Pa., by H. J. Wilder, A. T. Strahorn, and W. J. Geib ; Chester 

 county, Pa., by H. J. Wilder, T. A. Caine, W. J. Geib, and W. T. Carter, jr. ; 

 Upshur county, W. Va., by A. M. Grift'en and O. L. Ayrs; Louisa and Hanover 

 counties, X{i., by H. H. Bennett and W. E. JNIcIjendon ; the Yorktown area, Va., 

 by K. T. A. Burke and A. S. Root; Perquimans and Pasquotank counties, jV. C, 

 by J. E. Laphani and W. S. Lyman ; Duplin county, N. C, by A. S. Root and L. A. 

 Hurst ; York and Cherokee counties, S. C, by J. A. Drake and H. L. Belden ; 

 Spalding county, Ga., by J. E. Lapham, W. S. Lyman, and C. W. Ely; Leon 

 county, Fla., by H. J. Wilder, J. A. Drake, G. B. Jones, and W. J. Geib ; Lau- 

 derdale county, Ala., by F. E. Bonsteel, O. L. Ayrs, T. D. Rice, and E. P. Carr ; 

 Blount county, Ala., by W. G. Smith and F. N. Meeker ; ;Moutgomei-y county, 

 Ala., by W. B. McLendon and C. J. Mann ; Dallas county, Ala., by E. P. Carr, 

 W. E. Hearu, H. H. Bennett, and R. T. A. Burke; the Crystalsprings area, 

 Miss., by J. L. Burgess and W. E. Tharp; Tangipahoa parish. La., by A. M. 

 Griffen and T. A. Caine; East Baton Rouge parish, La., by C. W. Ely, H. W. 

 Marean, and N. P. Neill ; Houston county, Tex., by W. T. Carter, jr., and A. E. 

 Kocher; the Waco area, Tex., by A. W. Mangum and M. E. Carr; Lee county, 

 Tex., by J. L. Burgess and W. S. Lyman ; Lavaca county, Tex., by C. N. Mooney, 



F. Bennett, A. T. Strahorn, and H. I^. Belden ; Henderson county, Tenn., by 

 M. E. Carr and F. Bennett; Madison county, Ky., by A. M. Griffen and O. L. 

 Ayrs; McCracken county, Ky., by T. D. Rice; the Cleveland and Westerville 

 areas, Ohio, by J. E. Lapham and C. N. Mooney ; the Oxford area. Mich., by 



G. B. Jones and M. E. Carr ; Newton and Tippecanoe counties, Ind., by N. P. 

 Neill and W. E. Tharp; the Carlton area, Minn.-Wis., by W. J. Geib and G. B, 

 Jones; Portage county. Wis., by F. N. Meeker and R. T. A. Burke; Crawford 

 and Scotland counties. Mo., by W. E. Hearu and C. J. Mann ; Sarpy county, 

 Nebr., and the Carrington area, N. Dak., by A. E. Kocher and L. A. Hurst ; 

 Brown county, Ivans., by J. L. Burgess, W. E. Tharp, and W. S. Lyman ; the 

 Grand Junction area, Colo., by J. G. Holmes and T. D. Rice; the Gallatin 

 valley, Mont., by M. H. Lapham and C. W\ Ely ; the Stockton area, Cal., by 

 M. H. Lapham and W. W. Mackie; and Island county and llie Everett area, 

 Wash., by E. P. Carr and A. W. Mangum. 



