4 
TRANSACTIONS OF THE TEXAS ACADEMY OF SCIENCE. 
Percentage of ob- 
stacles detected. 
Average distance at 
which obstacles 
were detected. 
© 
be 
<1 
How long blind— in 
years. 
Age when became 
blind. 
Sex. 
C. S. H 
15 
8 
7 
Male. 
Ears open 
100 
11 
Face covered 
100 
Ears stopped. 
0 
E. P 
19 
10 
9 
Male. 
Ears open 
100 
5 
Face covered 
100 
Ears stopped 
0 
A. Gr 
13 
5 
8 
Male. 
Ears open . . 
100 
6 
*Faee coveret 
Ears stopped 
50 
2 
L. R 
8 
4 
4 
Male. 
Ears open 
100 
2 
Face covered 
Ears closed 
83* 
5 
P. D... 
22 
16 
6 
Male. 
Ears open 
100 
8 
Face covered 
100 
Ears stopped 
0 
E.M 
11 
6 
5 
Male. 
Ears open 
86 
2 
Face covered 
Ears closed 
0 
N. A 
22 
12 
10 
Female. 
Ears open 
66 
5 
Face covered 
fEars stopped 
16 
1 
D. B 
17 
15 
2 
Female. 
Ears open 
83 
7 
Face covered 
Ears stopped 
0 
tw. S 
21 
Ears open 
0 
* Out of thirteen trials with his ear stopped he detected the hoard six times under the fol- 
lowing circumstances : One time the board moved audibly ; once, wind blew ; once, walked into 
shade of building (and stopped. V. supra) ; twice, sun strong on board ; once board threw a long 
shadow, the sun being low. 
t At different times the sun was shining bright on the side of the board towards the sub- 
ject, on the opposite side and edgewise: and in each case on some trials she discovered it and 
on others did not. 
t Janitor, vision normal, carefully blindfolded. After running over board, always declared 
he felt it was there. The only seeing subject. 
