This would also have some tendency to raise prices in spite of the tremendous number of apple trees which have

come into bearing in the later portion of the period of time under consideration. The general method of plotting shown in Fig. 119 is of great importance and it should be kept in mind whenever two curves are found having similarities such as are seen in Fig. 118. Other examples of this method of plotting to study the correlation of two related

\

r.

j\i9n

«n

s!

^

\

•»

' ^

\

• 1897

.::

•Is.

,190?

--.

»IB9S

•l9D4

•

\tK

EO E5 30 35 40 45 50 55 GO 65 70 75

Quantity in Millions of Bbis,

Fig. iiQ. The Average Price of Apples in the

. 119. ine Average ir-nue oi Appies m uie „,,v- _^.„ ^-ii i,_ fo„„H m thp United States as Compared with the Total subjects wUi be lound m tne

last portion of Chapter X. Fig. 120 contains much

Supply

By this method, the positions of the dots on the chart show whether there is any close relation between supply and

price. The dots fall in fairly regular order, proving better information f Or the Studcut

than Fig. 118 that the price does largely depend upon the o i • . -ittt i

supply. A smooth curve has been drawn to represent Ot hlStory. We are here lU-

approximately the general relation between supply and 4-„„„„4.pJ -nartinnlnrlv I'n thp.

price which the dots might seem to indicate. Note that tereSLCU pdrtlCUldny in tne