RECORDS 51 



of the author's own observations with those which had been 

 arrived at and pubhshed by others. 



Edmund O. Hovey, 



Secretary. 



SECTION OF ANTHROPOLOGY AND PSYCHOLOGY. 



March 24, 1902. 



Section met at 8.30 P. M., Livingston Farrand presiding. 



The minutes of the last meeting of Section were read and 

 approved. 



The name of one candidate for resident membership was read 

 and referred to the Council according to the By-Laws. 



The following program was then offered : 



Clark Wissler, The Growth of Boys. 



W. S. Kahnweiler, A Trip through French Indo-China 

 TO THE Angkor Wat. 



On motion of Professor Boas, the Section reelected Living- 

 ston Farrand as Chairman and R. S. Woodworth as Secretary. 



Dr. Clark Wissler reported on the growth of boys. The 

 annual physical measurements of some three hundred school 

 boys were correlated to discover tendencies and directions of 

 growth. It appeared from the data that growth was rather 

 uniform, as for example, when a boy's legs were growing rap- 

 idly, his arms were also growing at a corresponding rate. By 

 correlating the stature with its increment for the following year 

 it was seen that the sign of correlation changes when the puber- 

 tial maximum of growth is crossed. This means that boys 

 who are growing rapidly at twelve, for example, continue to 

 grow rapidly until fourteen or fifteen, when they slow down, 

 while those growing slowly before this period now grow rap- 

 idly. Thus it appears that the point of pubertial maximum 

 rate of growth, as determined by mass measurements, is really 

 the point dividing the boys who mature early from those who 

 mature late. The relation is yet more in evidence when the 

 annual increments are correlated without regarding the abso- 

 lute measurements. The results as a whole seem to show that 



