French Pat., 449,343, Oct. 12, 1912.
[120] British Pat., 21,397, Sept. 26, 1907.
French Pat., 382,238, Sept. 26, 1907.
U.S. Pat., 982,902, Jan. 31, 1911.
[121] Pharm. Zentralhalle, 1915 (vol. lvi: pp. 343–48).
[122] Münch. Med. Wochschr., (vol. lviii: pp. 1868–72).
[123] Commercial Organic Analysis.
[124] Ann. Chem. Pharm. 1867 (vol. cxlii: p. 230).
[125] Inaugural Diss., Munich. 1903.
[126] Comptes Rendus, 1897 (vol. cxxiv: p. 1458).