1. The evidence justifying this and other statements, already set out (Lane, 1935), is not repeated.
2. D.C.F., Direct centrifugal floatation:D.C.F.F., the same using 4 + 1 preparations.
3. Ahmann, C. F., and Bristol, L. M.:South. Med. Jour., xxxvi, 959, 1933.
4. Ashford, Bailey K.: In The Duodenum, by E. L. Kellog, New York, p. 148, 1933.
5. Ashford and King, W. W.:J. A. M. A., xlix, 471, 1907.