Oct.. 1921] HARRIS AND OTHERS — PHASEOLUS VULGARIS 377 
Table i. 
Base of 
Line 29 
Line 75 
Line 98 
Line 139 
Line 143 
Hypocotyl 
3-3 
3-2 
2.-2 
3-3 
3-2 
2-2 
3-3 
3-2 
2-2 
3-3 
3-2 
2-2 
3-3 
3-2 
2-2 
(4) +0.. 
I 
sit 
«3 
lOI 
117 
2 

270 
2 
3 
291 
(4) + I • • 
— 
4 
1 1 

2 
39 

I 
55 
I 
5 
26 
3 
6 
102 
(4) +2.. 
I 
2 
I 

I 
14 

I 
0 

6 

(4) + 3 ■ ■ 
I 
— 
— 
— 
4 
— 
2 
. — 
— 
— 
(4) + 4. . 
I 
— 
2 
I 
(4) + 6 . . 
(4) + 7 • • 
— 
I 
— 
(5) +0.. 
7 
II 
I 
I 
4 
13 
4 
3 
7 
4 
2 
I 
15 
26 
13 
(5) + I . . 
6 
7 
3 
8 
7 
9 
6 
5 
8 
II 
2 
31 
20 
7 
(5) +2.. 
2 
3 
I 
2 
I 
(5) 
I 
'? 
I 
(6) +0.. 
39 
16 
107 
32 
7 
160 
I 
Q2 
20 
134 
52 
(6) + I . . 
I 
12 
6 
2 
10 
2 
I 
5 
2 
25 
6 
I 
(6) +2.. 
2 
2 
I 
(6) +4-- 
(7) +0.. 
I 
7 
I 
2 
I 
I 
I 
5 
I 
I 
(7) + I.. 
4 
(7) +2.. 
I 
(8) +0.. 
I 
I 
(8) + I.. 
I 
56 
43 
99 
142 
57 
199 
183 
43 
226 
106 
42 
305 
221 
114 
420 
Table 2 shows the average number of primary double bundles, inter- 
calary bundles, and total bundles in the three types of seedlings, and gives 
the differences and probable errors of differences in the means upon which 
we must depend for conclusions. 
The entries in the first section of this table show that the average 
number of primary double bundles is relatively lower in the hemitrimerous 
than in the trimerous seedlings. It is also relatively higher than the 
number in the dimerous seedlings. The differences, while small, may 
reasonably be considered significant in comparison with their probable 
errors. The differences between the hemitrimerous and the dimerous class 
are much larger than those between the hemitrimerous and the trimerous. 
Turning to the statistical constants for intercalary bundles set forth 
in the second section of table 2, we note that in four of the five cases the 
hemitrimerous seedlings have a larger number of intercalary bundles than 
the trimerous seedlings. These differences are small, but may be significant. 
In the one case in which the hemitrimerous seedlings have a smaller number 
of intercalary bundles than the trimerous plantlets the difference is only 
— o.oi zfc 0.04. In two of the cases the hemitrimerous show a larger 
number of intercalary bundles than the dimerous seedlings, but in three 
lines the reverse is true. The differences are in general not so large in 
comparison with their probable errors as in the case of the comparison for 
number of primary double bundles. 
