PRINCIPLES OF VALUE AND PRICE 



445 



The way is now prepared for a comparison of production per acre 

 in recent years with the normal increase of population; that is to say, 

 with the increase unaffected by immigration and the high birth-rate 

 of the immigrants. This is the form of the problem as it will present 

 itself more and more closely as the years elapse. 



From 1886-1895 to 1896-1905 the mean production per acre of 

 wheat increased in a greater degree than the normal increase of popu- 

 lation in four New England states, New York, New Jersey, and 



UJJlllJI 



1 1 H 1 1 1 1 n n i 



'so 



Yearly average yield per acre of 10 leading crops combined (representing in 

 area nearly 95 per cent of all cultivated crops), 100 representing the average for 

 the forty-three years, 1866-1908. (Figures for the last five years supplied by the 

 editor.) 



Pennsylvania, eleven southern states, Wisconsin, Nebraska, seven 

 mountain states and territories, and Washington. Two states are 

 very near inclusion in this list Wyoming and Oregon. In the case 

 of corn, increased production per acre has exceeded the normal 

 increase of population in Pennsylvania, Delaware, Maryland, Vir- 

 ginia, West Virginia, Ohio, Indiana, Illinois, Michigan, Wisconsin, 

 South Dakota, and three mountain states, and very nearly the required 

 increased production was made by New Jersey, North Dakota, Ne- 

 braska, New Mexico, and Arizona. 



