182 RECORDS. 



tion of these hills to the associated Cretaceous beds, and the 

 age of the intrusions were discussed. A brief petrographical de- 

 scription of the several igneous rocks was given, and the sub- 

 division and correlation of the sedimentaries on palaeontological 

 grounds considered. The origin of the anthracite coal of the 

 Madrid area, and the origin of the famous turquoise deposits 

 of the hills were then discussed. The speaker closed with a 

 resume of the geological history of the region. An interesting 

 discussion followed. 



George I. Finlay, 

 Secretary, pto tern. 



SECTION OF ANTHROPOLOGY AND PSYCHOLOGY. 



April 27, 1903. 



The regular meeting of the Section was held in conjunction 

 with the New York branch of the American Psychological 

 Association, Professor Thorndike presiding. 



The following papers were presented : 



E. L. Thorndike, Mental Traits in the Two Sexes. 



W. H. Davis, A Preliminary Report of Tests of Scien- 

 tific Men. 



S. C. Parker, Correlation of School Abilities. 



Robert MacDougall, The Specialization of the Hand in 

 Relation to Mental Development. 



Summary of Papers. 

 Professor E. L. Thorndike reported the results of extended 

 measurements of mental traits in the two sexes. In general the 

 females were less variable. In the case of children 9 to 12 the 

 ratio of female to male variability was .92 ; in the case of children 

 13 and 14 it was 1.02 ; in the case of children 15 it was .97 ; 

 in high school pupils .95 ; in college students .85. In the 

 abilities measured the greatest difference found was the female 

 superiority in the tests of impressibility, such as the rate and 

 accuracy of perception, verbal memory and spelling. In these 

 only about one third of the boys reach the median mark for girls. 



