•>8 
Diagram of Spkaying P^kfects with Arsenate of Lead. 
(Showing mutual influence of check and experimental plots.) 
n 
Experimental Plot (rows). 
Check Plot (rows). 
12 3 4 5 6 7 8 9 Oil 
12 13 14 15 16 17 18 19 20 21 22 
JOf)- 
90- 
80 - 
70- 
60- 
50- 
40- 
30- 
20- 
10- 
f ■ 
■ 
u 
y 
^ 
y^ 
/ 
T 
^ 
1 
/ 
/ 
/ 
/ 
' — 
V 
/ 
\ 
/ 
\ 
/ 
The above, diagram is simply a graphic representation of the 
data of the preceding table. The vertical lines represent the rows 
of trees in Orchard i, except the central line, which marks the di- 
vision between the half of the orchard which was sprayed and the 
half left imsprayed as a check. The horizontal lines, numbered 
from lo to lOO, indicate percentages of injured apples. The broken 
line crossing the diagram from left to right intersects the vertical 
line for each row at a point corresponding to the percentage of in- 
jured apples from that row. It will be noticed that the eleventh 
row of the series is the experimental row next to the check plot, 
and that the twelfth is the check row next to the experimental plot. 
