Table Illb. 
Discrimination of shades of gray for different intervals of time. 13 
<N 
o 
CO 
03 
ns 
CO 
CO 
CO 
05 
rH 
05 
rH 
co 
03 
+ 
CM 
03 
CO 
an' 
of 
ns" 
co" 
rH- 
s 
i 
I>" 
of 
•rtf 
c 
ib 
CO 
CO 
ns 
ns 
CO 
CO 
co 
no 
ns 
CO 
CO 
ns 
ns 
no 
ns 
o 
03 
CO 
03 
00, 
05 
rH 
05 
ns 
rH 
CO, 
nsr 
rH 
CO 
co 
rH 
O 
+ X 
CO 
05 
I'- 
00 
8 
Ol 
Ol 
CO 
<r> 
co' 
Ol 
ns 
L>* 
-l> 
CO 
00 
l> 
t> 
CO 
CO 
C'- 
CO 
CO 
CO 
O 
CO 
05 
r+i 
CO 
I> 
CO 
CO 
Ol 
rH 
T(î' 
cd' 
cd' 
o' 
r-f 
05 
03" 
CO 
ctf 
rH 
1>' 
+ * 
rH 
rH 
rH 
rH 
no 
no 
nS 
no 
ns 
rH 
ns 
ns 
»CS 
rH 
== 
r- 
rH 
O 
05 
05 
rH 
03 
I> 
[> 
co 
03 
ns 
03 
o 
CO 
rH 
co 
X 
ns 
CO 
o 
CO 
CO 
no 
CO 
rH 
t> 
05 
CO 
CO 
rH 
l> 
o 
CO 
no 
cd 
03 
rH 
T—1 
rH 
rH 
C 
O 
nO 
rH 
o 
rH 
o 
CO 
o 
[> 
rH 
CO 
rH 
t> 
CO 
rH 
CO 
CO 
i> 
rH 
o 
X 
CO 
00 
no 
rt< 
Ht< 
r- 
r- 
Ol 
an 
r> 
CO 
O 
no 
83 
CO 
CO 
l> 
CO 
c- 
l> 
CO 
L— 
co 
CO 
i> 
CO 
[> 
CO 
CO 
nO 
CO 
o 
05 
05 
rH 
C- 
03 
03 
03 
Ol 
o 
8 
CO 
CO 
CO 
CO 
03 
03 
03 
rH 
CO 
rH 
CO 
03 
CO 
03 
cq, 
of 
co" 
o 
cf 
6,1 
rH 
co" 
t-H 
»cf 
6,0 
ns, 
cd" 
nq 
rH 
no 
cf 
th, 
co" 
><q 
03" 
rH, 
05, 
3,4 
5,0 
5,6 
Cq 
rH" 
CO 
T—f 
rH 
rH 
rH 
rH 
rH 
rH 
rH 
rH 
© 
© 
rH 
of 
nq 
rH 
CO 
co" 
Cq 
rH 
03 
© 
00„ 
Hit 
O 
of 
°o 
co" 
Oq 
nq 
Htf 
rH 
rH, 
Cq 
CO 
»o' 
cq. 
cq. 
nq 
no" 
nq. 
X 
03 
CO 
rH 
»0 
rH 
rH 
no 
no 
no 
CO 
ns 
ns 
rH 
no 
ns 
no 
ns 
no 
rt< 
CO 
o 
05 
05 
ns 
I> 
03 
03 
03 
03 
05 
O 
r- 
*■ 
CO 
CO 
CO 
03 
03 
rH 
CO 
rH 
o’: 
03 
03 
CO 
Ol 
= 
c- 
CO 
CO 
CO 
t> 
rH 
CO 
CO 
03 
rH 
I> 
CO 
rH 
CO 
05 
CO 
CO 
05 
X 
rH 
CO 
o 
CO 
03 
CO 
CO 
L- 
o 
O 
CO 
ns 
o 
O 
CO 
o 
CO 
CO 
rH 
rH 
rH 
rH 
rH 
CO 
rH 
rH 
CM 
03 
rH 
© 
03 
CO 
CO 
CO 
CO 
O 
o 
CO 
t> 
05 
o 
CO 
rH 
rH 
rH 
I> 
[> 
03 
GO 
X 
03 
L> 
co 
CO 
CO 
no 
nO 
CO 
nO 
Ol 
CO 
05 
03 
»Q 
t- 
rH 
tH 
rH 
CO 
rH 
03 
03 
03 
03 
03 
03 
03 
CO 
CO 
03 
rH 
CO 
CO 
CO . 
rH 
03 
rH 
o 
rH 
CO 
05 
05 
03 
03 
03 
05 
05 
an 
rH 
rH 
CO 
CO 
CO 
rH 
no 
rH 
CO 
03 
03 
03 
03 
== 
D- 
rH 
co 
C- 
no 
05 
rH 
CO 
co 
05 
03 
CO 
00 
CO 
CO 
CO 
X 
o' 
Ö 
05 
cd 
Hji 
rf 
co' 
rH 
o' 
O 
ns" 
D-" 
co" 
CO 
o 
of 
of 
03 
rH 
rH 
rH 
rH 
rH 
rH 
tH 
rH 
rH 
rH 
rH 
rH 
rH 
O 
CO, 
CO 
nq 
cq 
-H 
o 
03 
ns 
05 
CO 
cq 
rH 
rH, 
o 
o 
co 
05 
co 
X 
no 
& 
a; 
ns 
Hft 
00 
GO 
no 
CO 
rH 
|r- 
05 
05 
8 
8 
rH 
cd 
rH 
rH 
CO 
rH 
rH 
ns 
no 
rH 
no 
ns 
no 
rH 
CO 
ns 
rH 
CCS 
rH 
rH 
03 
CO 
O 
05 
CO 
03 
03 
03 
O 
05 
rH 
CO 
CO 
co 
03 
rH 
CO 
rH 
co 
03 
CO 
03 
03 
= 
no 
ns 
rH 
05 
HO 
t* 
o 
CO 
co 
O 
CO 
rH 
CO 
CO 
CO 
o 
CO 
CO 
rH 
03 
CO 
CO 
CO 
CO 
o 
CO 
no 
05 
rH 
rH 
CO 
CO 
00 
CO 
03 
rH 
o 
rH 
05 
© 
CO 
O 
CO 
r~ 
CO 
t> 
CO 
CO 
05 
03 
CO 
CO 
»o 
o 
<r> 
CO 
CO 
X 
CO 
8 
O' 
cd' 
3 
of 
cd' 
cd’ 
rH' 
ns" 
o" 
cd' 
o 
of 
»Q 
of 
rH 
CO 
05 
co 
CO 
CO 
co 
CO 
CO 
rH 
l> 
fr* 
CO 
CO 
CO 
ns 
ns 
§ 
t> 
O 
03 
05 
05 
r» 
CO 
03 
Ol 
03 
8 
05 
an 
CO 
rH 
CO 
03 
03 
OJ 
rH 
CO 
rH 
CO 
03 
03 
03 
„ 
-+J 
ns 
ns 
rH 
o 
CO 
© 
CO 
I Av 
no 
rH 
o 
CO 
Ô 
CO 
% 
no 
no 
rH 
Ö 
co 
Ö 
CO 
[ Av 
ib 
rH 
8 8 
1 Av 
O 
U^Q OU 
Xff 
J ou 
Xff 
<o 
o 
t-l 
I -rapjo aat;x 
II -wp^O 0™1X 
œ 
p 
^g; ^uoSisog;