66 
BULLETIN 813, TJ. S. DEPARTMENT OF AGRICULTURE. 
mally, each figure recorded in Table VIII under this heading is the 
average of three fruits, but in some instances it has been s soured 
from one or two fruits. The total averages shown for each month, 
those for each season, and those for the five years were obtained by 
factoring the total number of seeds and the number of fruits exam- 
ined for that purpose during the period indicated rather than by 
averaging the monthly averages. 
The average number of seeds per fruit indicated by this method 
varies considerably from the true average of all the fruits produced. 
There is a considerable variation in seed content on the trees of 
many of the strains between the fruit produced during different 
months. Fruit production is much heavier in certain months than 
during other months, while in the system of averaging here used, 
which was the only practicable one under the circumstances, equal 
weight is given to the seed data for each month. 
F07>U. O0O0 &PjT£/Y GX>*sO£- 
G/PWs&r g>/p. 
*?J?0. CLP pW /^^ ■^7f^ , ■ 2&.£0 
^//x/s> m/<3oo I &.&£> 
Fig. 10.— Diagram showing the average annual total crops and the amounts of fruit of the different com" 
mercial grades produced by the trees of the several strains of Eureka lemons occurring in the investiga- 
tional performance-record plat during the 6-year period from July, 1911, to June, 1917, inclusive. The 
strains are ranked according to the weight of their average total crops. 
Table XI shows the average annual crops of the individual Eureka 
lemon trees in the investigational performance-record plat, arranged 
in groups of strains and of select trees within, some of the strains. 
The strains are listed in the order of their rank by total crops by 
weight, and the production of fruit of the different grades is also 
shown. These averages are shown graphically in figure 10. Several 
of the strains are represented by different numbers of individuals, so 
no exact comparisons can be drawn between them. However, as in 
nearly every case the trees within each strain have shown a consid- 
erable degree of uniformity with respect to their various character- 
istics, the data shown in this and the following tables are thought 
to be fairly indicative of the relative values of the different strains 
represented. 
Table XI shows the trees of the Eureka strain to be more produc- 
tive than those of any other in the list, with an average annual pro- 
duction of 230 pounds for the 6-year period. Of the 76 Eureka trees 
