1. Fairbrother and Renshaw, Times, March 31, 1922; Journ. Pathol. and Bacteriol., 1922, 25, p. 145.
2. Stilling, Lancet, 1890, 2, p. 965; ib., 1891, 1, p. 873.
3. Churchman, Journ. Exper. Med., 1912, 15, p. 221; ib., 1921, 33, pp, 569 and 583.
4. Drigalski and Conradi, Zeitschr. f. Hyg., 1902, 39, p. 283.
5. Browning and Gilmour, Journ. Pathol. and Bacteriol., 1913, 18, p. 144; Browning, Gilmour, and Gulbransen in Browning's "Applied Bacteriology," London, 1918, p. 65.