Appendix 139 



EXPLANATIONS: 



A. Based on Who's Who in America (Chicago, 1912), 

 see p. xxiii. Number of living noted persons born in 

 each state (irrespective of date of birth) divided by the 

 population of the state according to the census of 1850. 

 States then ranked from highest to lowest. This census 

 was more than a decade earher than the average age of 

 the noted persons, but the computation was made for 

 purposes of comparison. 



B. The census gives the density of population in each 

 state for each decade. See Statistical Abstract of the 

 United States, 191 1, pp. 52-53 (Bureau of Statistics, 

 Washington). The census figures for 1850 have been 

 ranked, as above. 



C. Same as A except based on census of i860. 



D. Same as A except based on census figures for white 

 population in i860. See Statistical Abstract of the 

 United States, 1909, pp. 46-52 (Bureau of Statistics, 

 Washington). 



E. Based on Who's Who in Science. (Macmillan, 

 1910.) A selection was made of all scientists born in 

 the United States between 1850 and 1870. These were 

 classified by state of birth, and the number for each 

 state was divided by the population of the state in i860. 

 The ranking was then made as in other cases. 



F. Out of a large list of noted American scientists Dr. 

 Cattell has selected with the greatest care the 1,000 most 

 prominent. From this 1,000 he has selected the 867 native- 

 born, classified them by state of birth, and divided the 

 number for each state by the population of the state in 

 i860. He also makes a tentative comparison with density 

 of population, and it is noteworthy that though he does 

 not push the investigation very far, he suggests practi- 

 cally the same conclusion as that arrived at in this study. 

 See Cattell, American Men of Science, pp. 553-559. On 

 p. 554 will be found the table from which the rankings in 

 Column F have been prepared. 



