GEOGRAPHY OF WHEAT PRICES. 25 
price spreads have been attended by decreasing transportation costs 
and development of distributive methods; also by a decline of wheat 
growing east of the Mississippi, as well as by comparative concen- 
Fig. 5.—Decreasing farm-price differences between Pennsylvania (importing 
State) and Minnesota (exporting State). 
FIVE KFEAR FEFIODS, 1871 JOVHS 
187-5  /882-6 (891-5 S9Ol-8 60-15 
1871-75 | 1882-86 | 1891-95 | 1901-5 | 1911-15 
Pennsylvania. .| Per cent. - 125 123 122 117 lil 
Pricetes--- $1. 27 $0. 96 $0. 73 $0. 84 $0. 97 
Minnesota. ..... Per cent 74 88 95 97 99 
Price.....-| $0.75 $0. 69 $0. 57 $0. 70 $0. 86- 
tration of the national wheat production within the West North Cen- 
tral group. A steady increase may be seen in the relative prices of 
Fig. 6.—Changing farm-price ratios, Idaho (transition from importing to 
exporting State) and Oregon (exporting State). 
A FIVE KEAR PERIODS, 187/70 7WS 
VE 71S. 1882-6  /829/-5. —((9Of-8—— 11-035 
Percentages. 
1871-75 | 1882-86 | 1891-95 | 1901+5 | 1911-15 
IGEN) + -Heessace Per cent. .|......--- 115 98 97 83 
iBricesseeea ee eae cece $0. 90 $0. 59 $0. 70 $0. 72 
Oregon..-..---- Per cent - 83 “92 98 96 94 
Price...-.. $0. 85 $0. 72 $0. 59 $0. 69 $0. 82 
the great wheat States of this group compared with the United 
States as a whole; on the other hand, a rapid decrease took place 
in the Mountain States. Farmers in wheat-importing States of the 
