FLO WEES AND BOLLS OF PIMA AND ACALA COTTON 11 
the outer nodes, where on the sixth node it was reduced to but 2 or 
3 per cent of the squares produced there. Node 4 in 1924 presents 
the only instance where a greater proportion of squares were developed 
into mature bolls than on the preceding node. The terminal nodes 
of long fruiting branches matured one-fifth of their squares into bolls 
in 1924, but only about one- twentieth in 1925, when the shedding of 
the outer squares was greatly increased. The percentage of open 
bolls developed from squares produced on fruiting branches of only 
a single node was about intermediate between the percentages 
developed on nodes 2 and 3 each year. A larger proportion of the 
total number of squares which reached the flowering stage developed 
into mature bolls in 1925 than in 1924. 
Data on the same features of fruiting as shown in Table 6 for Pima 
are given in Table 7 for the main stalks of 20 Acala plants in 1924 
and 1925. In 1925 the percentage of square shedding was some- 
what higher than for the preceding year. In both seasons the per- 
centage of shedding increased gradually from node 1 to node 3, but 
increased rapidly thereafter, reaching 84 per cent on nodes 6 to last in 
1924 and 96 per cent in 1925. The shedding of squares from the 
terminal node of all fruiting branches of two or more nodes was ex- 
ceeded only by the shedding from nodes 6 to last in both years. 
Shedding from branches of only one node was approximately the 
same as from node 2 of the longer branches in 1924, but was greater 
than the shedding from node 4 in 1925. 
The proportion of squares to make open bolls decreased uniformly 
from 20 per cent on node 1 to 3 per cent on the sixth-to-last nodes in 
1924, and from 31 per cent to 2 per cent for the corresponding nodes 
in 1925. Proportionally fewer squares developed into open bolls on 
the last nodes of branches of two or more nodes in 1924 than on any 
specific node, and fewer of the last node squares developed into open 
bolls than on any nodes, except the sixth-to-last category in 1925. 
The same proportion of boils matured from squares borne on branches 
of only one node in each year, and the proportion was about equal to 
that for node 2 in 1924 and for node 3 in 1925. 
Comparing the data in Table 6 with those in Table 7, it seems evi- 
dent that corresponding nodes of the fruiting branches of Pima and 
Acala did not show consistent differences in respect to square shed- 
ding. The total square shedding for entire Acala plants was shown 
in Tables 1 and 2 to be but very sligh'tly higher than for Pima plants. 
As previously pointed out in the discussion of Tables 1 and 2, the 
percentage of squares developing into mature bolls was much higher 
on plants of Pima than on Acala, and this will be seen to hold true in 
comparing specific nodes of the two varieties, except, perhaps, on 
nodes toward the end of long Pima branches, as in comparing nodes 
6 to last with the same node in the Acala tables. 
