this age group. Hillsboro and Merrimack increases were clue almost 

 entirely to an increased number of children to 4. The increased fertility 

 ratio of Coos County is due in greater degree to a decline in women 15 

 to 44 than to an increase in children per 1,000 women of this age group. 



Migration is the greatest influence on fertility ratios in Carroll and Coos 

 counties. In the other counties natural causes were more significant. 



Table 16. Related Significance of Migration and of Natural Causes on the 

 Increased Fertility Ratios of New Hampshire Counties 



m 



ales 



per 



1,000 



■s- 



females declined between 1940 and 



Effect on Sex Ratio 



The number of 

 1950 in all counties but Grafton.* With the exception of Carroll County, 

 the greatest major influence causing this change in sex ratios was migration. 



Table 17. Number of Males per 100 Females in Counties of New Hampshire 



and the Relative Significance of Migration and Natural Causes 



on these Changes — 1940 to 1950 



This is probably due to the inclusion of boarding students in the population. 



14 



