58 
Table XYIII. — Mydriatic action of natural l-adrenalin — Continued. 
EXCISED FROG’S EYE- Continued. 
Experiment 44a. 
1 : 125,000. 
Experiment 46a. 
1 : 625,000. 
Experiment 47a. 
1 : 3,125,000. 
Time. 
Long 
axis. 
Short 
axis. 
Time. 
Long 
axis. 
Short 
axis. 1 
1 
Time. 
Long Short- 
axis. axis. 
11.16 
In adrenalin. 
11.29 
In adrenalin. 
1.9 
In adrenalin. 
P. m. 
M. TO. 
M. TO. 
P. TO. 
Tf. TO. 
M. TO. 
A. TO. 
M. TO. JLf. TO. 
12. 26 
“ 2. 670 
“2.465 
4.36 
“2.485 23.0° 
“1. 825 
70 
6 1.080 
61.445 
307 
6 0. 590 C. 
6 0.390 
12.35 
“2. 645 
“2. 465 
4. 54 
“2.480 
“1.890 
79 
6 1. 055 
6 1.445 
325 
6 0.585 
6 0.455 
12. 44 
“2.650 
“2.500 
6. 51 
“2.390 
“ 1. 855 
88 
6 0.960 
61.480 
442 
6 0. 495 
6 0. 420 
' 12. 47 
“2.650 
“2.500 ' 
6.54 
a 2. 390 
“1. 870 
91 
6 0.960 
61.480 
■ 445 
6 0.495 22.4° 
6 0.435 
1.12 
“2.640 
“ 2. 525 
7. 32 
“2.325 C. 
“1.840 
116 
6 0.950 
61. 550 
483 
6 0. 430 
6 0. 405 
1.20 
“ 2. 655 
“2.480 
7. 56 
“ 2. 255 
“1.845 
124 
6 0.965 
61.460 
517 
6 0. 360 
6 0. 410 
1.35 
“2.580 
“2.435 
137 
6 0. 890 
61.415 
c 55 min. 
c 114 min. 
c 307 min, c 325 min. 
c 17 min. c 145 min. 
“Actual length of axis at time measured. 
& Change in length of axis after the eye is exposed to 2 c. c. of adrenalin solution for the niimherof 
minutes indicated to left in tune column. 
cTime required for each axis to reach a maximum length. 
The readings recorded in Tables X^TI and are taken from 
eves immersed in 1:2,000. 1:5,000, 1:25,000, 1:125,000, 1:625,000, 
and 1 : 3,125,000 solutions of natural l-adrenalin kept at nearly con- 
stant temperatures and lighted by electric light. It ^vih be noticed 
that ^vith an increased concentration of adrenalin there is a shorten- 
ing of the time required to cause maximum dilation. If we take the 
mean of the times in Tables XVII and XATII recjuired by the long 
and short axes to reach a maximum length it ’will be found that — 
1: 2,000 caused maximum dilation in 16 min, 
1: 5,000 caused maximum dilation in 22 min. 
1:25,000 caused maximum dilation in 70 min. 
1: 125,000 caused maximum dilation in 84 min. 
1: 625,000 caused maximum dilation in 316 min. 
1:3,125,000 caused maximum dilation in (81)? min. 
On the '^diole the results are not very satisfactory, and if the mini- 
mum time necessary for one of the axes be taken to represent the 
time of dilation the results are even less concordant. The solutions 
in the order named above cause maximum dilation in 13, 14, 66, 55, 
307, and 17 minutes, respectively. 
