1. Blane:Observations on the Diseases of Seamen. London, 1785.
2. See List in Index Catalogue of Library, Surgeon-General’s Office, U.S. Army, underHemeralopia.
3. Little:Jo. Am. Med. Ass., June 29, 1912; Oct. 10, 1914.
4. Fernando:Amer. Jo. Ophthal., May, 1923.
5. Medical Research Council.Report on the Present State of Knowledge of Accessory Food Factors, 1924.