192 
Parr .— The Response of Pilobolus to Light. 
Light 
source. 
Senes 
No. 
Colour. 
Wave¬ 
length. 
Te?np. °C. 
Zm* of exposure 
in mins. 
% /w- 
tive. 
% In¬ 
different. 
Presentation 
time in min. 
Nernst 
Gn i 
Green 
± 523 
24-5 
7.02-8.09! 
= 67! 
62 
38 
lamp 
Gn 2 
yy 
24-0 
4.17-5.26 
= 69 
100 
0 
Gn 3 
yy 
23-6 
5.04-6.10 
-66 
8 
92 
671 
B io 
Blue 
± 496 
23-6 
7.40-8.40 
= 60 
0 
100 
B 17 
„ 
yy 
237 
8.15-9.22 
= 67 
90 
10 
B 19 
yy 
» 
24-8 
5.41-6.46 
= 66 
66 
34 
65 
Bn 12 
yy 
0 
!>. 
-*1" 
+1 
26-0 
5.00-6 05 
= 65 
75 
25 
Bn 13 
yy 
26.0 
6.58-8.00 
= 62 
25 
75 
Bn 16 
yy 
24.7 
6.48-7.51 
= 63 
20 
80 
63 
I 2 
Indigo 
± 4 6 4 
23-8 
4.38-5.40 
= 62 
55 
45 
13 
yy 
23.2 
5.42-6.42 
= 60 
34 
66 
14 
yy 
23*4 
4.24-5.28 
= 64 
100 
0 
62 
In 9 
± 437 
247 
5.34-6.31 
= 57 
0 
100 
In 10 
• 
yy 
24-6 
6.32-7.32 
= 60 
42 
58 
In 11 
yy 
23-6 
5 - 54 — G.56 
= 62 
90 
10 
60 
V 10 
Violet 
± 4 T 4 
257 
4.58-5.50 
= 52 
25 
75 
V 12 
„ 
yy 
24*3 
4.21-5.19 
= 58 
75 
25 
V13 
yy 
25-2 
6.48-7.44 
= 56 
60 
40 
5 r > 
Vn 7 
± 39 s 
25-6 
4 * 49 - 5*43 
= 54 
11 
89 
V11 10 
„ 
26-5 
5.05-6.00 
= 55 
54 
46 
Vn 11 
yy 
26*5 
6.05-7.01 
= 56 
74 
26 
55 
Table VII. 
Light 
Series 
Colour. 
Wave¬ 
Temp. 
Time of exposure 
% Posi¬ 
% Indif¬ 
Presentation 
source. 
No. 
length. 
°C. 
in mins. 
tive. 
ferent. 
time in min. 
Tungsten 
Rt 2 
Red 
00 
0 
+1 
2 6*6 
6 * 32 - 7*37 = 65 
0 
100 
lamp 
Rt 3 
yy 
yy 
24*0 
6*39-7 47 = 68 
50 
50 
Rt 4 
yy 
yy 
26*4 
427-5*36 =69 
7 i 
29 
68 
Ra 6 
yy 
±667 
23*4 
5.36-6.42! = 66| 
57 
43 
Ra 7 
yy 
yy 
23*0 
6.46-7.50 = 64 
15 
85 
66! 
Ra 8 
yy 
yy 
25*6 
4.48-5.56 = 68 
95 
5 
Ot 3 
Orange 
+ 631 
25*8 
4.58-6.02! = 64! 
50 
50 
Ot 4 
yy 
yy 
25*8 
6.04-7.10 = 66 
70 
30 
Ot 5 
yy 
yy 
25*9 
7.12-8.14 = 62 
36 
64 
64! 
Oa 1 
yy 
± 612 
24*6 
6.17-7.21 = 64 
5 ° 
50 
Oa 2 
yy 
yy 
23*1 
4.20-5.26 = 66 
100 
0 
Oa 3 
yy 
yy 
23*2 
5.27-6.29 = 62 
25 
75 
64 
vt 4 
Yellow 
±589 
23*6 
6.00-7.01 = 61 
0 
100 
Yt 8 
yy 
yy 
25*0 
6.05-7.09 = 64 
75 
25 
Vt9 
yy 
yy 
2 4’4 
7.11-8.14 =63 
75 
25 
63 
Ya 12 
yy 
±585 
24*8 
6.12-7.15 =63 
42 
58 
Ya 13 
yy 
yy 
25*2 
4 * 54 - 5*59 =65 
90 
10 
Ya 14 
yy 
yy 
257 
5.50-6.52 = 62 
10 
90 
63 
Ga 1 
Green 
± 54 ° 
21-5 
6 * 33 - 7*33 = 60 
45 
55 
Ga 2 
„ 
„ 
21-5 
7.34-8.32 = 58 
37 
63 
Ga 3 
24*0 
4.24-5.26 = 62 
100 
0 
60 
Gt 3 
yy 
±523 
26*0 
6 * 54 - 7*57 =63 
7 i 
29 
Gt 4 
yy 
yy 
24*9 
7.06-8.04 = 58 
0 
100 
Gt 8 
yy 
yy 
24*6 
5.44-6.44 = 60 
82 
18 
59 
Ba 7 
Blue 
±496 
23.6 
5.06-6.05 = 59 
67 
34 
Ba 8 
yy 
yy 
24*0 
6.15-7.11 =56 
20 
80 
Ba 11 
yy 
yy 
26*0 
4 - 35 - 5-32 = 57 
56 
44 
57 
