102 Economic Cycles: Their Law and Cause 



Percentage chande in the yield per acre ofoats Percentage change in theyie/d per acre of potatoes. 



Figure 22. Tho relation between the price and the yield per acre of the 



several crops. 

 When the origin is at (0,0), the equations are 



For corn 

 For hay 

 Fto oats 

 For potatoes 



yrs. 1866-1889, _ ._, y=— 2.00— 1.0299* + .01926**— .000312* 3 . 



yrs. 1890-1911, ,y= 3.06— 1 .4894* + . 01737* 2 — .0OO049.r 3 . 



yrs. 1866-1889, - - -,y = — 5.72— 1 .6435* + . 07798**— .000574*'. 



yrs. 1890-1911, ,y = 5.41— .7306*— .00591**+. 000075* 3 . 



yrs. 1866-1889, y = — 2.78— 1.6039*— .00546** +.000778* 3 . 



yrs. 1890-1911, — , y = .99— 1.0240* +.02394* *— .000383* 8 . 

 yrs. 1866-1889, - ._, y=— 3.92— 1.4424* + .01684**— .000020* 3 . 

 yrs. 1890-1911, ,2/=— .91— 1.6068* + .03831*«— .OO0397* 3 . 



