ESTIMATING FUTURE POPULATION 95 



curve predicts for those years populations of 1,690,000 and 

 2,250,000. For Baltimore the agreement between prediction 

 and census are equally good. The census figures for 1900 and 









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1910 are 508,957 and 670,585 and the predicted values, scaled 

 from the diagram, are 520,000 and 650,000. 



The other method assumes that the city in question is like 

 other cities of the same size as regards its rate of increase, and 

 that it will follow, approximately at least, the same law. This 

 method was followed in Appendix No. i to the report of the 



