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Published online by Cambridge University Press: 27 March 2009
With such conflicting results it is difficult to draw definite conclusions. The data are not put forward with that object, but it was felt that there is sufficient interest in the figures themselves to warrant publication. This communication is intended as an interim report on investigations which will be continued as time and occasion permit. However, the general features most worthy of note are as follows:—
(1) The order of the solvent power of the three solutions of each of the two classes remains the same throughout. In the citrate solutions the order is (descending), (1) neutral, (2) acid, (3) alkaline solution, with only two exceptions, viz., the raw bone meals No. 7 and No. 9, discussed under Table III.
With the free acid the solubilities are in the order of the strength of solution without exception.
page 430 note 1 Wiley, . “Report on Fertilizers to Indiana State Board of Agriculture, 1882.” Proceedings of the Association of Official Agricultural Chemists. Atalanta, 1884, &c.Google Scholar
page 430 note 2 Hoffmeister, . Landw. Versuchs. Stat., 1898, 50, 363.Google Scholar
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page 431 note 2 L., Gebek. Zeits. angew. Chem., 1894, 193–197.Google Scholar
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page 431 note 4 Ibid.
page 431 note 5 Chem. Zeit., 1880, 19, 37, and 1887, 905.Google Scholar
page 432 note 1 Wagner, . Landw. Versuchs. Stat., 1895.Google Scholar
page 432 note 2 Journ. Chem. Soc., March, 1894.
page 432 note 3 Journ. Soc. Chem. Ind. xx., p. 325 (04, 1901).Google Scholar According to Hughes' method, the proportion of manure to solvent is made 1: 1000, and the time of digestion 24 hours. In the present investigations the above proportion was made 1: 100, and the time 18 hours in order to obtain uniformity between this and the other two citric acid methods.
page 432 note 4 Runyan, and Wiley, . Paper presented to the Washington Section of the American Chemical Society, 1895.Google Scholar
page 433 note 1 Wagner, P.. Chem. Zeit., 1897, 21, 905.Google Scholar
page 439 note 1 “Indeed, some experiments seem to show that an excessive percentage of oil retards decomposition, not only in the fish meal itself, but in the adjacent particles of soil.”—Artificial Fertilizers (H. Richardson & Co.), 1895.Google Scholar
page 440 note 1 For detailed analyses of Peruvian guano see Wagner's Chemical Technology, 1892, p. 424; or Manual of Agricultural Chemistry, Herbert Ingle, 1902, pp. 130–131.Google Scholar