WHAT MAKES THE PRICE OF OAT& 
PftlCE 
CENTS 
PER BUSHEL 
90 
80 
70 
60 
50 
40 
30 
20 
I 

90 
80 
70 
60 
50 
40 
30 
20 
10 
CONTINUOUS THIRD DEGREE PARABOLA TREND 
1881 to 1913 
-TWO STRAIGHT LINE TRENDS 
1881 to 1895 and 1896 to 1913 
1881-82 ! 1890-91 
1885-86 
I900-'0l 
I9I0-MI 
!895-'96 1905-06 I9I5-'I6 l925-'26 
Two methods of representing the trend of oat prices 
Fig. 2.— It is impossible to represent the trend of actual oat prices by a single straight line. The trend of 
the price of oats was downward from the Civil War period until 1896, and upward from 1896 to 1919. 
A parabola and two straight lines are used in this figure to represent the trend of oat prices from 1881 
to 1913 
