414 



THE POPULAR SCIENCE MONTHLY 



life in the city than in the country. 

 The death rate in New York City is low 

 because owing to emigration from 

 abroad and the influx of young people 

 from the country an unusually large 

 percentage of the population is at the 

 age when deaths are few. 



In order to compare populations of 

 different age and sex constitutions it is 

 necessary to recalculate the rates for a 

 standard population. Our Census Bu- 

 reau has rather oddly chosen the popu- 



lation of England as the permanent 

 basis of standardized rates. This pop- 

 ulation is about as abnormal as could 

 be found, it having resulted from a 

 large birth rate rapidly declining and 

 a large emigration. For example, there 

 is an excess of 1,200,000 women. There 

 should be an international convention 

 to fix a standard population, either a 

 weighted average of the populations of 

 the countries having adequate sta- 

 tistics, or an ideal population resulting, 





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Front and Rear Views op the Building for the Department of Terrestrial 



Magnetism. 



