BUD VARIATION IN THE MARSH GRAPEFRUIT. 21 
these tables is their average total annual production expressed in 
pounds, without regard to the quality or uniformity of the fruit. 
This arbitrary basis is adopted only because of the impracticability 
of working out a system to show the actual relative commercial 
^ value of each individual tree; hence, the order in which the trees 
are here listed is not always an indication of their true value, either 
as fruit producers or as sources of desirable bud wood for propaga- 
tion. 
In expressing the averages of weights in these tables only one 
decimal place has been retained, and in the figures showing the 
averages of the number of fruits occurring in different groups no 
decimal has been retained except where the average is less than 
unity; hence, it will be found that the totals of averages will some- 
times vary slightly from the average of the totals of the correspond- 
ing numbers. 
Cull fruits were not recorded for the years 1910 and 1911, hence 
the average production of that grade is not strictly comparable 
with the averages of the other grades, and the total of the averages 
of the three grades is not equivalent to the average of the total crops. 
Because it is impracticable to assort the culls by sizes, the fruits 
listed by sizes under the heading "Total crop" represent only the 
total commercial crops, being equal to the total crop exclusive of 
the culls. 
In determining the seed content of fruits on the different trees, 
counts are made, when possible, of the seeds in a small, a medium, 
and a large fruit of each of the three grades. In this way a record is 
secured of the actual number of seeds in nine fruits from each tree, 
yearly, and it is thought that this system gives a fairly accurate indi- 
cation of the relative seediness of the fruits of the different trees. 
Counts were not made on plat B until 1912, and no determinations 
were made in the Cull grade on either plat until 1914. In 1910, only 
one fruit of the Ivory-White grade and two fruits of the Standard 
grade were used for this purpose. In 1911 and 1912, three fruits from 
the Ivory-White grade and six from the Standard grade were used, 
and in 1913 three from both the Ivory-White and Standard grades 
were cut« In 1914 and 1915, three fruits from each of the three grades 
were examined, when possible. The general average for each year 
is secured on the basis of the actual number of fruits examined and 
not from an average of the averages of the different grades. No 
record of the occurrence of variable fruits was made until 1912. 
The increase in the number of such fruits recorded during recent 
years is due to the fact that the observers have gradually become 
familiar with additional variable forms. Practically all the variable 
fruits recorded are of minor importance, such as those with ridges, 
raised or sunken sections, or creases. 
