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REFERENCES. 
(1) Beddoe, Races of Britain, 1885. 
(2) Brownlee, “A Note on the Possibility of Analysing Race Mixtures,” Jour. 
Roy. Anth. Inst. Great Britain and Ireland, July 1911. 
(3) Bateson and Punnett, “The Interrelations of Genetic Factors,” Proc. Roy. 
Soc., March 1911. 
(4) Pearson, “ On the Criterion that a given System of Deviations from the Pro- 
bable in the case of a Correlated System of Variables is such that it can be reasonably 
supposed to have arisen from Random Sampling,” Phil. Mag., July 1900. 
(5) Elderton, “ Tables for Testing the Goodness of Fit of Theory to Observation,” 
Biometrika, vol. i. p. 155. 
(6) Yule, “ On the Association of Attributes in Statistics,” Phil. Trans., vol. cxciv., 
A, 1900, pp. 284-5. 
( Issued separately February 19 , 1913 .) 
