SOILS — PERTILIZEKS. £5 



investigations wliich liave been more fully reported elsewhere (E S R 2S 

 p. 426). . . ., , 



Phosphates, H. S. Gale, R. W. Richards, and E. Blackweldee {U. S. Oeol. 

 Survey Bui. 403~H, pp. 99, pis. 10, figs. 7).— The principal article in this bulle- 

 tin is a preliminary report on the phosphate deposits in southeastern Idaho 

 and adjacent parts of Wyoming and Utah. This is based upon geological and 

 topographical surveys made during the summer of 1909, the area examined com- 

 prising parts of Bear Lake County, Idaho, Uinta County, Wyo., and Rich, Weber, 

 and Morgan counties, Utah. As a result of this work the total area now with- 

 held from public entry is 2,551,899 acres as compared with 4,541,300 acres with- 

 drawn by the Secretary of the Interior in 1908 pending an examination of the 

 phosphate resources of the district. The estimated tonnage of available high 

 grade (70 per cent) phosphate in the area examined is given as follows: 

 Georgetown area 90,000,000 long tons, Montpelier-Bennington area 16,000,000, 

 Hot Springs-Dingle area 27,000,000, Sublette Mountain area 32,000,000, Coke- 

 ville area 2,400,000, Beckwith Hills area 2,800,000, Crawford Mountain area 

 90,000,000, and the Laketown area 6,750,000, making a total of 266,950,000 long 

 tons. There is in addition a large amount of intermediate and low grade 

 phosphate which might eventually be used to advantage. Analyses of 4 rep- 

 resentative samples of the high grade phosphate showed phosphoric acid rang- 

 ing from 27.32 to 36.35 per cent, alumina from 0.50 to 0.97 per cent, ferric oxid 

 from 0.26 to 0.73 per cent, and lime from 45.34 to 50.97 per cent. 



A list of Geological Survey publications on phosphates and other mineral 

 fertilizers is appended. For abstracts of other reports on the phosphate deposits 

 described in this bulletin see previous notes (B. S. R., 21, p. 25; 23, p. 426). 



Preliminary report of the phosphate deposits in southeastern Idaho and 

 adjacent parts of Wyoming' and Utah, H. S. Gale and R. W. Richards 

 {Amer. Fert., 33 {1910), Nos. 6, pp. 9-13, fig. 1; 7, pp. 9-16C, figs. 5; 8, pp. 11- 

 18, figs. 2; 9, pp. 11-19, figs. 3; 10, pp. U-20, figs. 2).— An abbreviated reprint 

 of a portion of the above bulletin. 



Phosphate deposits east of Ogden, Utah, E. Blackweldee {Amer. Fert., 33 

 {1910), No. 11, pp. 13-18, figs. 4). — ^An abbreviated reprint of a part of the 

 Geological Survey bulletin referred to above. 



Chemical treatment of Russian phosphorites, D. N. Prianishnikov {Dnevn. 

 XII. S"i€zda Ross. Est.-Isp. i Vrach., No. 8, p. 342; abs. in Zhnr. Opidtn. 

 Agron. {Riiss. Jour.-Expt. Landio.), 11 {1910), No. 1, pp. 106, 107).— By means 

 of pot tests conducted since 1896 it has been established that for the majority 

 of plants and for most soils (except podzols and peat soils with acid reaction) 

 phosphorites can not serve as phosphatic fertilizers directly, but must first be 

 subjected to technical treatment, various processes of which are described. 



Phosphatic fertilizers, Rigaux {Jour. Soc. Cent. Agr. Belg., 57 {1910), No. 7, 

 pp. 193-199).— This article describes different kinds of phosphates and dis- 

 cusses their fertilizing value. Attention is especially called to a phosphate 

 which is prepared by subjecting insoluble mineral phosphates to a high tem- 

 perature, thereby increasing the availability of the phosphoric acid. 



Effects of soluble salts on insoluble phosphates, J. E. Greaves {Jour. Biol. 

 Chcin., 7 (1910), No. //, 2W- 287-319; abs. in Chem. ZentbL, 1910, I, No. 18, p. 

 1631).— This article reviews investigations on the action of nitrates, ammo- 

 nium salts, lime, salt, and iron sulphate on the solubility of phosphates and 

 reports laboratory experiments by the author which showed that calcium and 

 iron salts decreased the solubility of the phosphates, that sodium, potassium, 

 and ammonium phosphates, ammonium chlorid and nitrate and magnesium 

 nitrate increased the solubility of calcium phosphate, and that sodium and 



