GEOGKAPHY 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). 
/7is£r yr^/? /=>£/?/o/3S, /&?/ ro /s/^ 
/&7/S /&&£"-& /&3/-S /30/S A9//-/S 
/2S 
/BO 
^ ^ /oo 
\X *° 
£<$ so 
\ ™ 
^ o 
*GMMSi*f 
*4Af/sq — 
^^■"--^ 
C/A//TFD SZ4TFS /OO % 
|" 
•dtk 
^^ 
$T 
Pennsylvania . . 
Minnesota 
Per cent . . 
Price 
Per cent . . 
Price 
1871-75 
1882-86 
1891-95 
1901-5 
1911-15 
125 
SL 27 
74 
$0.75 
123 
$0.96 
88 
$0.69 
122 
$0.73 
95 
$0.57 
117 
$0.84 
97 
$0.70 
111 
$0.97 
99 
$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). 
'S&Ltt KEXI/P0E7P/&&5, '/&7/TO/&AS 
J07/S /&3?-e /SS/-S /SO/S /&//-AS- 
125 
120 
115 
m 110 
I 105 
"8 ioo 
a> 
5 95 
6 90 
85 
80 
75 
70 

>$b 
^o 
UA//7EDS* 
Z4Ttt^sJ 
OOJ4 
eflOli* 
^^ 
(t&^ 
Z*^ 
1 
Per cent . . 
1871-75 
1882-86 
1891-95 
1901-5 
1911-15 
115 
$0.90 
92 
$0.72 
98 
$0.59 
98 
$0.59 
97 
$0.70 
96 
$0.69 
83 
$0.72 
94 
$0.82 
Oregon 
Per cent . . 
Price 
83 
$0.85 
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 
