Abstract

References
1.
Allison
V. D.
(1932 ). L.C.C. Ann. Rep. for 1930 , 4 (pt. 3), 15 .
2.
Bayliss
W. M.
(1924 ). “Principles of general physiology,”
4th ed. , London , Preface p. ix .
3.
Black
J. B.
(1934 ). Amer. Journ. of Hyg. , 19 , 734 .
4.
Bulloch
W.
(1935 ). Journ. Path, and Bact. , 40 , 621 .
5.
Dudley
S. P.
Brennan
J. R.
(1935 ). Journ. of Hyg. , 34 , 825 .
6.
Dudley
S. F.
May
P. M.
O'Flynn
J. A.
(1934 ). Med. Res. Coun. Spec. Rep. Series , No. 195.
7.
Elton
C.
(1927 ). “Animal ecology,” London.
8.
Fildes
P.
(1934 ). Proc. Roy. Soc. Med. , 28 , 79 .
9.
Fisher
R. A.
(1930 ). “The genetical theory of natural selection,” Oxford, 21 .
10.
Gause
G. F.
(1934 ). “The struggle for existence,” Baltimore.
11.
Greenwood
M.
(1935 ). “Epidemics and crowd diseases,” London.
12.
Griffiths
F.
(1928 ). Journ. of Hyg. , 27 , 114 .
13.
Haldane
J. B. S.
(1932 ). “The causes of evolution,” London, 93 .
14.
Haldane
J. B. S.
(1935 ). Nature , 135 , 726 .
15.
Lankester
E. R.
(1907 ). “The kingdom of man,” London, 33 .
16.
Penrose
L. S.
Haldane
J. B. S.
(1935 ). Nature , 135 , 907 .
17.
Reimann
H. A.
(1929 ). Journ. Exp. Med. , 49 , 237 .
18.
Robinson
D. T.
Marshall
F. N.
(1935 ). Lancet (ii), 441 .
19.
Smith
Theobald
(1934 ). “Parasitism and disease,” Princetown. Introduction, p. ix; p. 65 .
20.
Thomson
J. G.
(1935 ). Proc. Roy. Soc. Med. , 28 , 35 .
21.
Turbott
H. B.
(1931 ). (Quoted in “Editorial”), Lancet (ii), 970 .
22.
Weismann
A.
(1893 ). “The germplasm” (translated), London, 415 .
23.
White
P. B.
(1925–1926 ). Med. Res. Coun. Spec. Rep. Series , Nos. 91 and 103.
24.
Wyckoff
R. W. G.
(1934 ). Journ. Exper. Med. , 59 , 381 .
25.
Yorke
W.
Murgatroyd
F.
Hawking
F.
(1933 ). Brit. Med. Journ. (i), 176 .
