( 60 ) 
contractions can last for several hours and often with great regularity *). 
Under these circumstances, however, A K is no more a determined 
quantity and the experiment cannot fulfil the condition of the formula, 
that A / be a constant quantity in the successive determinations. If 
we only use those experiments, in which the resistances are pretty 
considerable, and the new state of equilibrium is reached after a few 
oscillations, 4 / fulfils the condition, that it represents a small quantity 
in successive determinations. The experiment does not allow another 
more definite conception of this quantity. 
By the addition of acid from the burette to the liquid in which 
the leg is immerged, the level of the liquid rises, and the stimulated 
surface increases. So the experiment does not fulfil the condition of 
the formula in this respect either. 
TABLE III. TABLE IVS (Fig VII.) 
No 21 (7.42. OS) No. 14. (isa. 01.) 
| eps A Cone. 
Cone. | AConc. | 5 Pela Cone. | A Cone. —____—_. 
| Cone | Conc. 
2 C3105 ‘ 00 107 >i 
9.610" 15-90 
Seo 1529 
427 0.327 ED 0.168 
5.3 19.4 
1.4 0.203 4.5 | 0.499 
6.7 Del 9° 
24 0.236 ee | "0.935 
88 30.9 
DO 0.299 8.0 0.207 
12.4 38.9 
Ole 0.339 4.3 0.098 
18.7 43.9 
10.5 0.359 Bie) 0.082 
99 9 47.0 
12.4 0.297 19.9 0.997 
41.6 66.9 
8.7 0.173 27.6 0.292 
50 | 94.5 
| 96.0 yy art | 46.8 |, Ota 
16.3 | | 7 ebi | 
| 155 | OEL De 
TEER TA EE 126.6 
Section of the medulla 10.15 A.M. 
beginning of the experiment 12.56 P.M. . 
Temp. 15 C. Section of the medulla 10 P.M. 20.9. _ 
beginning of the exper. 12.4 P.M. 21.9 
Temp. 16.5:°C, 
') It seems to me that the heart is in this condition, and it would be worth 
while to repeat many experiments from the physiology of the heart on this ryth- 
mically acting reflex-apparatus. 
» = 
7 
