18 
the heated plat. In the nonheated plat 19,200 merchantable fruits 
were taken from the trees, as compared with 12,440 merchantable 
fruits in the heated orchard. 
In the May picking relatively few frozen fruits were taken from 
either plat, but only 2,820 merchantable lemons were found in the 
nonheated orchard, as compared with 22,820 in the heated one. 
With the exception of the April picking, in which the first mer- 
chantable fruits were taken from the frozen plat, the heated plat 
produced a greater percentage of merchantable lemons 
during each picking throughout the calendar year until 
the last picking in December. At this time the trees 
in the frozen orchard had about returned to normal 
production. 
A study of the tables and diagrams presented for the 
other plats shows that practically all the nonheated 
orchards had returned to normal production by the end 
of the calendar year. 
A similar comparison is sho^Ti in figure 7, which por- 
trays graphically the proportion of frozen and mer- 
chantable lemons produced on plat 9, an acre of heated 
Lisbon lemon trees, in comparison with plat 10, an acre 
of nonheated Lisbon lemon trees. Practically all the 
frozen fruits in the nonheated orchard were removed 
from the trees at the 
first picking in March. 
The heated orchard 
had 8,380 frozen fruits 
during that month, as 
compared with 144,540 
merchantable lemons. 
During the succeeding 
months the heated 
orchard bore a consid- 
erable number of sound 
fruits, while no mer- 
chantable lemons were 
taken from the frozen plat until the December pickuig, when the 
trees had about returned to normal production. 
Figure 8 shows the number of frozen and merchantable lemons 
produced on an acre of nonheated Eureka lemon trees (plat 3), 
as compared with an acre of partially heated (plat 5) and an acre of 
heated trees (plat 7). 
As in figures 6 and 7, the greater proportion of the fruit in the non- 
heated orchard is found in the frozen column, with a smaller number 
in the partially heated orchard, and very few frozen fruits in the 
heated orchard. This diagram shows ver}' clearly the beneficial 
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Tig. 7. — Diagram sho-\ving the number of frozen and merchant- 
able fruits produced on plat 9, a heated acre of Lisbon lemon 
trees, and plat 10, a nonheated acre of Lisbon lemon trees. The 
figures here sho'u-n are taken from Tables XIII and XIV, 
respectively, which give the estimated production by grades for 
each month's picking for these plats during the calendar year 1913. 
