june26, i9i6 Mmeral Phosphates and Plant Nutrition 513 



LITERATURE CITED 

 (i) Bishop, W. H. 



1894. Report of pot experiments with phosphates. Del. Agr. Exp. Sta. 6th 



Ann. Rpt., 1893, p. 193-202, illus. 



(2) Brooks, W. P. 



1898. Natural phosphates compared with each other and with acid phosphate. 



In Mass. Hatch Agr. Exp. Sta. loth Ann. Rpt., [1896/97], p. 14-19. 

 Reviews work done by Goessmann. 



(3) • 



1901. The relative value of different phosphates. In Mass. Hatch Agr. Exp. 

 Sta. 13th Ann. Rpt., [1899/1900], p. 101-105. 



(4) Dyer, B. 



1884. Comparison of dissolved and undissolved phosphates. (Abstract.) 



In Jour. Chem. Soc. [London], v. 46, Abstracts, p. 774. 1884. 

 Original article in Jour. Roy. Agr. Soc. England, s. 2, v. 20, p. 113- 

 126. 1884. Not seen. 



(5) Frear, William. 



1887. Agricultural experiment work for 1885 and 1886. II. Experiments with 

 different kinds of phosphoric acid. Penn. State, Col. Rpt., 1886, p. 

 124-131. 



(6) HartwEll, B. L., and Pember, F. R. 



1912. The effect of cow dung on the availability of rock phosphate. R. I. 



Agr. Exp. Sta. Bui. 151, p. 165-174, i pi. 



(7) Hess, E. H. 



1896. Experiments with soluble, reverted and insoluble phosphoric acid. 

 Penn. Agr. Exp. Sta. Ann. Rpt., 1895, p. 157-210. 



(8) Hopkins, C. G., Mosier, J. G., Pettit, J. H., and Fisher, O. S. 



1913. McDonough cotmty soils. 111. Agr. Exp. Sta. Soil Rpt. 7, 46 p., 7 fig., 



2 col. maps. 



(9) Johnson, S. W. 



1890. Field experiments in 1889. In Conn. Agr. Exp. Sta. Ann. Rpt. 1889, 

 p. 203-232. 



(10) Jordan, W. H. 



1895. Field experiments with fertilizers. In Maine Agr. Exp. Sta. Rpt., 



1894, p. 16-32. 



(11) . 



1913. Studies in plant nutrition. I. N. Y. Agr. Exp. Sta. Bui. 358, 30 p. 



(12) Krober, E. 



1909. tjber das Loslichwerden der Phosphorsaure aus wasserunloslichen 

 \'erbindungen imter der Einwirkung von Bakterien und Hefen. In 

 Joiu". Landw., Bd. 57, Heft i, p. 5-80. 



(13) Litton, N. T. 



1893. The effect of decomposing organic matter on natiiral phosphates. Ala. 

 Agr. Exp. Sta. Bui. 48, 80 p. 



(14) McDowell, M. S. 



1908. Is the phosphoric acid of floats made soluble by rotting manure? Penn. 

 Agr. Exp. Sta. Ann. Rpt., 1907/0S, p. 175-17S. 



(15) Merrill, L. H. 



1899. Box experiments with pho.sphoric acid from different sources. Maine 



Agr. Exp. Sta. 14th Ann. Rpt., 1898, p. 64-74, 7 pi. 



(16) Newman, J. S. 



1889. Cotton — experiments with fertilizers. In Ala. Agr. Exp. Sta. Bui. 5, 

 n. s., p. 3-13. 



