WHEN OUR COUNTRY IS FIFTY YEARS OLDER 575 



DIAGRAM SHOWING THE PROBABLE USES OE THE LAND OE NORTH AMERICA 50 YEARS 



HENCE 



cultivation are highly developed. France 

 is especially interesting as a criterion, 

 because its methods are most intensive 

 and it is the only country that is self- 

 sustaining; it produces 98 per cent of 

 all the cereals which it consumes. There 

 is little doubt that our population in the 

 next fifty years will reach at least 150,- 

 000,000, or about 50 persons per square 



mile. Whether the acreage of improved 

 farm land will increase at a much faster 

 rate than the population, as has been 

 the case in the past, or whether it will 

 grow at the same or even a slower rate 

 than the population, the future alone 

 can tell ; but increase it must. 



In mountainous Switzerland only 17 

 per cent of the land is cultivated, and in 



