[239] Compiled for author by Mr. K. P. McElroy.

[240] Volume First, pp. 356 et seq.

[241] Volume First, pp. 337 and 390.

[242] Volume Second, p. 81.

[243] Day: Mineral Resources of the United States, 1893, p. 713.

[244] Frankland: Agricultural Analysis, p. 240.

[245] Volume Second, p. 9.

[246] Annual Report Connecticut Agricultural Experiment Station, 1888, Part 1, p. 80.

[247] Rapport addressé par le Comté des Stations Agronomiques, 1887, p. 34.

[248] Agricultural Science, Vol. 8, pp. 2 and 3, 1894, and Massachusetts Agricultural Station, 12th Annual Report, pp. 285 et seq.

[249] North Carolina Agricultural Experiment Station, Bulletin No. 3.

[250] Bulletin No. 43, Chemical Division, U. S. Department of Agriculture, p. 390.

[251] Compiled for author by Mr. K. P. McElroy.

[252] Volume First, p. 337.

[253] Vid op. cit. 12, p. 391.