104 Social Environment 



and Northwest, so far as the states in the cen- 

 sus of 1840 extended. On the basis of the 

 census of i860 it was found that in both cases 

 a decided correlation existed (see Appendix, 

 Table i. Cor, 2,2 and 33 ) . The coefficients pre- 

 viously mentioned were therefore not a meas- 

 ure of a peculiarity limited to one area alone. 



When the computation is based on Who's 

 Who in Science, and on Dr. Cattell's list of 

 great scientists, the results are changed but 

 little. In the former case the coefficient based 

 on the census of i860 is 0.66 ± 0.07, and in 

 the latter it is 0.59 ±0.10. Though these fig- 

 ures are a little lower than the preceding, they 

 are still very decisive. 



It is therefore evident that a marked rela- 

 tionship exists between density of population 

 and fertility in men of note — that for some 

 reason a densely populated state is more favor- 

 able to the production of prominent men than 

 is a sparsely settled state. A further study of 

 the data is now called for to determine, if 

 possible, the factors giving significance to dens- 

 ity of population. Economic and cultural influ- 

 ences in the environment will be given some 

 attention, then the possibility of a biological 

 cause will be considered. 



