TABLE 18
LIGHT BLUE-ORANGE
Brightness check series Mouse No. 2, Series 13
Feb. 8, 1906
TEST CONDITION RIGHT WRONG
1 Light blue on right
Orange on left Right ____
2 Light blue on left
Orange on right Right ____
3 Light blue on right
Red substituted for orange Right ____
4 Light blur on left
Red substituted for orange Right ____
5 Dark blue on right
Orange on left Right ____
6 Dark blue on left
Orange on right Right ____