WATER SOILS. 1061 



"(2) This (adolH') !?<'il wlu'ii krpt thri'i'-foiirths saturated throughout tlie season 

 is too wet ft)r wheat. 



"(8) Wheat will do well up to the time of filling in a soil that would be compar- 

 atively dry for corn, and if the soil is keptcjuite moist at the time of lilling the yield 

 will be about as good as if this high moisture content had been maintained through- 

 out the season. 



"(4) Adjacent plats kept in nearly identical moisture condition show considerable 

 differences in yield, and also plats which vary very nuich in moisture content may 

 give rearly the same yield. This shows that other factors exert a marked influence 

 on yield. 



"(5) The most of the water applied to these plats was held in the first 3 ft. of the 

 soil. 



"(6) When this soil is fairly dry it will absorb about 5 acre-inches of water." 



Soil temperatures at various depths, J. B. Reynolds (^Ontario Agr. Col. and 

 Expt. Farm Rpt. 1903, p. 12, Jig. 1). — A record is given of monthly soil temperatures 

 at depths of 3 and 6 in. and 1, 2, and 3 ft. from April to December, 1903, inclusive. 

 The daily variations are also summarized. 



Investigation of the composition of soils rich in vegetable matter, E. CJ. De 

 CoRiOLis {Ontario Agr. Col. and Expt. Farm Rpt. 1903, pp. 3S-40, fig. 1). — Pot exper- 

 iments with such a soil shown by analysis to be deficient in available jiotash are 

 reported. The results indicate that the greatest need of the soil was an improvement 

 of the conditions necessary to the growth of nitrifying organisms. 



Analyses of soils of the State, (1. d'Utra {Bol. Agr. Sao Paulo, 4- ser., 1903, No. 

 12, pp. 551-557). — Chemical analyses of 91 samples of soils from different parts of Sao 

 Paulo are reported, with suggestions as to their fertilizer requirements. 



Analyses of soils, C. F. Juritz {Rpt. Senior Analyst, Cape Good Hope, 1903, pp. 

 45-4S). — Chemical analyses of 24 samples of soil from different parts of the Colony are 

 reported and discussed. 



Analyses of soils from-Armant, F. Hughes {.lour. Kliediv. Agr. Soc. and Scliool 

 Agr., G {1904), No. 1, }^p. 13-10). — Total and available (by Dyer's method) potash 

 and phosphoric acid and nitrogen are reported. Only a very small proportion of the 

 total potash and i)hosphoric acid were available. 



Preliminary analytical studies of the cultivated soils of Padua, G. Ongaro 

 {Staz. Sper. Agr. Ital., 36 {1903), pp. 926-930; abs. in Chem. Centhl., 1904, I, No. 15, 

 pp. 1098, 1099).- — Data for mechanical and chemical analyses of some of these soils 

 are reported. 



Experiments in washing salt land {Jour. Khediv. Agr. Soc. and School Agr., 6 

 {1904), No. 1, p. l.i). — In a comparative test of warping, washing by means of open 

 drains, and washing by means of tile drains, the best results in yield of cotton were 

 obtained by the last method. 



The work of the Bureau of Soils ( f/. S. D(}>t. Agr., Bureau of Soils Circ. 13, pp. 

 13). — A condensed account of the work of the Bureau with particular reference to its 

 practical side, intended for distribution at the Louisiana Purchase Exposition. 



Geology, T. C. Chamberlin and R. D. Salisbury {New York: Henry Holt & Co., 

 1904, vol. 1, pp. XIX-\-654, pis. 24, figs. 471). — "In the preparation of this work it 

 has been the purpose of the authors to present an outline of the salient features of 

 geology, as now developed, encumbered as little as possible by technicalities and 

 details whose bearings on the general theme are unimj^ortant. In connnon with 

 most writers of text-books on geology, the authors believe that the subject is best 

 ap,i)roached l)y a study (jf the forces and processes now in o})eration, and of the results 

 which these forces and processes are now bringing about. Such study necessarily 

 involves a consideration of the principles which govern the activities of geologic 

 agencies. These topics are presented in Volume I, and prepare the way for the study 

 of the history of past ages, which is outlined in Volume II. 



