CD 



Ml 



f/^yyy^ 5 TO 1 5 Pea cent 

 ^$$^ (6 TO 25 »za cr»»T 

 y^^^ 26 TO 50 i»CB CEfcT 



50 PER CENT 4HD OvfH 



Fig. 4. Percentajro of increase or decrease of rural population of 

 Michigan bj' counties (1910-1920). Rural population is defined 

 as that residing outside incorporated places having 2,500 inhabi- 

 tants or more. 



133 



