574 Wisconsin Academy of Sciences, Arts, and Letters. 
Table X. Paht 1. —Showing distribution of sporanges in the morning when 
right opening had been closed. 
Time when 
examined. 
A. M. 
Left half of field. 
Right half of field. 
Total. 
Left of 
opening - . 
Opening. 
Right of 
opening. 
Leftl of 
opening. 
Opening. 
Right of 
opening. 
7:15. 
0 
0 
O' 
0 
0 
0 
0 
7:30. 
0 
0 
0 
0 
0 
0 
0 
8:00. 
0 
0 
0 
0 
0 
0 
0 
8:30. 
0 
53 
1 
0 
0 
0 
54 
9:00. 
2 
16 
2 
0 
0 
1 
21 
9:15. 
8 
40 
10 
3 
0 
2 
63 
9:30. 
4 
79 
11 
4 
0 
1 
99 
9:45. 
0 
0 
0 
0 
0 
0 
0 
10:00. 
4 
3 
0 
0 
0 
0 
7 
10:15. 
0 
0 
0 
0 
0 
0 
0 
10:30. 
13 
28 
8 
2 
0 
0 
51 
Table X. Part 2.— Showing distribution of sporanges in the evening. At 
time indicated the left opening was closed and the right opened. 
Time of 
changing light. 
A. M. 
Left half of field. 
Right half of field. 
Total. 
Left of 
opening. 
Opening. 
Right of 
opening. 
Left of 
opening. 
Opening. 
Right of 
opening. 
7:15. 
1 
0 
3 
58 
86 
13 
161 
7:30. . 
0 
1 
2 
15 
38 
12 
68 
8:00. 
7 
3 
10 
12 
37 
13 
82 
8:30. 
2 
1 
21 
5 
17 
1 
47 
9:00. 
5 
13 
19 
6 
13 
0 
56 
9:15. 
7 
13 
19 
8 
18 
3 
68 
9:30. 
15 
3 
5 
8 
14 
0 
45 
9:45. 
0 
0 
J 
33 
109 
18 
161 
10:00. 
2 
3 
5 
10 
12 
4 
36 
10:15. 
4 
0 
1 
31 
11 
3 
50 
10:30. 
9 
15 
31 
13 
28 
6 
102 
In the experiment in which the light was shifted at 9 :45, 
no sporanges had been discharged at the time the change was 
made. In the evening, one sporange only was found on the 
left half of the field, showing that all of the sporangiophores 
hut one had reacted to the new stimulus. The re-aiming was 
nearly as perfect as the original aim, 67.7% being found upon 
the new opening, 11.2% beyond it to the right, and 20.5% 
between the opening and the middle line of the field. 
In the experiment in which the light was changed at 10:15 
A. M., the re-aiming was less perfect. In this case, also, no 
sporanges had been discharged at the time the light was 
changed, but some of the sporanges were later discharged while 
the sporangiophores hearing them were still directed at the 
