1. LehmannLancet, 1946,250, 15.
2. YoumanQuart. Bull. Northwestern Univ. Med. School, 1946,20, 420,;Chem. Abstracts, 1947,41, 1011.
3. Youman “German Patents” Nos. 77806 and 79865 of 3rd April 1897.
4. Youman “B. I. O. S. Final Report” No. 1149, p. 19.
5. Seidel and BittnerMonatsch, 1902,23, 431;Ber., 1901,34, 4352.