142 CARNEGIE INSTITUTION OF WASHINGTON. 



data on a number of matters relating to their musical environment and 

 history. The results will appear both in the ''Studies" of the Univer- 

 sity of Iowa and the Bulletin of the Eugenics Record Office. The 

 original pedigree charts and copies of all records are deposited at the 

 Office. Altogether, 85 persons were measured by the Seashore tests, 

 and data were obtained concerning 446 other persons. Miss Stanton 

 concludes that the four factors studied are inherited independently. 

 As a first approximation, the evidence suggests that superior capacity 

 dominates over average and poor capacities, rather than the reverse. 

 The study is perhaps the first quantitative study of the inheritance of a 

 special capacity. 



Calculating Ancestral Influence. 



Studies on formulae for calculating ancestral influence have been 

 continued by Dr. Laughlin. A more complete statement (than that 

 which appeared in the Proceedings of the National Academy of Sciences 

 for May 1920) of formulae and their explanations was published in 

 Genetics for September 1920. To the 24 original formulae, which 

 measure specific contributions of ancestral chromosomes, one more 

 rule of pedigree analysis was added. This rule is : In a species in which 

 the female sex-chromosome formula is X+X, the minimum number of 

 ancestors in a given ancestral generation, among whom will be found all 

 of the possible contributors of the sex-chromosomes to the Fi female 

 zygote, is equal to the Fibonacci serial term p + 3, in which p is the 

 number of the given ancestral generation (for parents p = 1, for grand- 

 parents p = 2, etc.) . In a species in which the sex-chromosome formula 

 for the male is X+Y, the minimum number of ancestors in a given 

 ancestral generation, among whom will be found all of the possible 

 contributors of the sex-chromosomes to the Fi male zygote, is equal to 

 Fibonacci term (p+2) 4-1. 



Eugenics in Germany. 



An analysis was made by Dr. Laughlin of the Constitution of the 

 new German Republic, in which it was found that many provisions 

 were made by the German people for the maintenance of racial vigor 

 and fecundity of the German stock. A short account of this study 

 appeared in the Eugenics Review for January 1921. 



STUDIES ON THE RACIAL CONSTITUTION OF AMERICAN POPULATION. 



Army Anthropology. 



The Director was requested by the Surgeon General of the Army, 

 on July 7, 1919, to supervise the measurement of 100,000 soldiers at 

 demobilization. It was directed that white and colored should be 

 distinguished, also the nationality of those born abroad or of parents 

 born abroad. The Director spent part time in Washington for about 

 3 months in the summer and autumn of 1919 and supervised the tabula- 



