[585] Annual Report, U. S. Department of Agriculture, 1886, p. 354.
[586] This work, Vol. 2, p. 318.
[587] Vid. California Bulletins cited under 50: Wolff; Aschen Analyse, S. 126.
[588] Bulletin 100, Cornell Agricultural Experiment Station: Bulletin 48, Chemical Division, U. S. Department of Agriculture.
[589] Vid. op. cit. 51, p. 353.
[590] Vid. op. cit. ultimo sub 54.
[591] Bulletin No. 42, Arkansas Agricultural Experiment Station, p. 78.
[592] Annual Report, U. S. Department of Agriculture, 1884, p. 347.
[593] Spencer; Bulletin 13, U. S. Department of Agriculture, pp. 875 et seq.
[594] Journal of Analytical and Applied Chemistry, Vol. 4, p. 390; Bulletin 13, Chemical Division, U. S. Department of Agriculture, p. 889.