[566] Zeitschrift für analytische Chemie, Band 35, S. 498.

[567] Annual Report of the Maine Agricultural Experiment Station, 1891, p. 25: Gay; Annales Agronomiques, 1885, p. 145, et 1896, pp. 145 et seq.

[568] Annales Agronomiques, Tome 21, pp. 149, 150.

[569] Vid. op. et loc. cit. primo sub 33.

[570] Twelfth Annual Report of the Massachusetts Agricultural Experiment Station, 1894, p. 175.

[571] See also paragraph [586] this volume.

[572] Manuscript prepared for publication as a part of Bulletin 13, Chemical Division, U. S. Department of Agriculture.

[573] Vid. this volume, paragraph [280].

[574] Vid. op. cit. 31, p. 1020.

[575] Bulletin 45, Chemical Division, U.S. Department of Agriculture, p. 12.