ESTIMATING FUTURE POPULATION 



99 



50,000, the number increasing from 50 to 100 per cent is smaller, 

 only 14 per cent of 56 towns given increasing more than 100 

 per cent. 



Mr. Kuichling extends this study farther, and suggests 

 that the rate of increase is so well fixed to correspond with the 

 size of town that the relation once established may in most 

 cases be used to predict the future growth of any town of known 

 size. He bases the relation which he believes to exist on a 



iO.OOO 



50,000 



100,000 



150,000 



POPULATION. 

 FIG. 21. 



detailed study of the Census reports, where the rate of increase 

 for towns of varying sizes seems to continually decrease as the 

 size of the town increases, the average per cent of increase for 

 towns of the same size agreeing very closely. The preceding 

 table is taken from his report as compiled from the U. S. 

 Census of 1880, and shows average rates of annual increase for 

 cities of the United States. 



The table shows very plainly (see Fig. 21 for the graphical 

 representation) a law of decrease in the annual rates as the size 



