128 
THE THRESHOLD OF VISION FOR DIFFERENT COLOURED LIGHTS. 
Table VII. (continued). 
. 
Intensity of peripheral illu- 
Ratio of central to peripheral 
mination in terms of— 
illumination for equal brightness. 
SSN. 
/T- 
Luminosity (lux). 
Dark adapted. 
Light adapted. 
32*2 
493 
0-012 
5-35 
0-024 
5-44 
0-05 
3-81 
o-io 
0-21 
3-12 
2-39 
.1-45 
0-46 
2-07 
0-58 
2-06 
0-93 
1-85 
- 
21-8 
457 
0-0013 
9-30 
0-005 
13-0 
o-oio 
7-11 
0-022 
3-76 
0-030 
3-88 
0-041 
2-80 
-1-51 
0-060 
2-33 
0-093 
2-13 
0-13 
2-06 
0-20 
1-95 
0-25 
1-87 
- 
