[203] Pearson (ubi supra) measured 12-year-old English school children, and found the average cephalic index for 2298 boys to be 78.88, with σ = 3.2, for 2188 girls 78.43, with σ = 3.9. It is not proper to compare adolescents with adults, however.
[204] Sewall Wright has pointed out (Journal of Heredity, VIII, p. 376) that the white blaze in the hair can not be finally classed as dominant or recessive until the progeny of two affected persons have been seen. All matings so far studied have been between an affected person and a normal. It may be that the white blaze (or piebaldism) represents merely a heterozygous condition, and that the trait is really a recessive. The same argument applies to brachydactyly.
The following pages contain advertisements of a few of the Macmillan books on kindred subjects.
Comparative Free Government
By JESSE MACY
Professor Emeritus of Political Science
AND
JOHN W. GANNAWAY
Professor of Political Science in Grinnell College
Cloth, 8vo, $2.25
The United States is made the basis for this study because it has been in fact the pioneer in securing world recognition for free government, and it is the originator of the Presidential type. The first part of "Comparative Free Government" is devoted to a somewhat detailed description of the organization and processes of government in the United States, together with a brief comparative study of selected South American republics. The second part is devoted chiefly to a study of the cabinet type. England is given first place as the originator of the system. The object of the book is to throw light upon the growth and perfection of free government in all states rather than to make a general comparison of governmental institutions. It is particularly adapted to use as a text in college courses.
Problems of Child Welfare
By GEORGE B. MANGOLD, Ph.D.
Director of the School of Social Economy of Washington University