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CONTENTS

LEADING ARTICLES

PAGE

Our Memorial Volume. Wesley C. Mitchell.

119

The Relation Between Birth Rate and Death Rate in a Normal Popu-
lation and the Rational Basis of an Empirical Formula for the
Mean Length of Life Given by William Farr. Alfred J. Lotka... 121

Occupational Propinquity as a Factor in Marriage Selection. Donald

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Preliminary Note on the Incidence of Epidemic Influenza Among the

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Sickness Surveys of the Metropolitan Life Insurance Company. A.
H. Mowbray

956

An Introduction to Statistical Methods. J. H. P....

A Note on King's Article on "The Correlation of Historical Economic

Variables and the Misuse of Coefficients in this Connection.'

Edmund E. Day....

Introduction to Mathematical Statistics. Arthur Sargent Field..
The Mathematical Theory of Population, of its Character and Fluctu-
ations, and of the Factors Which Influence Them. Appendix A,
Vol. I, Census of the Commonwealth of Australia. Arne Fisher..
Harald Westergaard: "Statistikens Teori i Grundrids." T. W....
Committee Work in Federal Statistics and Legislation for the Four-

152

156

158

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