632 Sergius Morgults 
TABLE XXVI 
Pilocarpine I : 10,000,000 
August 31 to September 14 (1907) 
NUMBER OF SEGMENTS 
Old | Regenerated Old Regenerated 
15 4 16 6 N 
16 4 18 6 
17 | 4 16 on 
16 5 16 7 
17 | 5 17 7 
17 5 18 q. 
18 5 15 8 
16 5 17 8 
17 5 
a 5 Average 
14 6 
15 6 16.5 5.8 
16 6 
Ratio of new to old segments., 35.4 p. c. 
In this case the average number of regenerated segments, like- 
wise the numerical relation between the new and the old segments, 
are somewhat greater than in the control, but a conclusion as to 
the stimulating influence of pilocarpine could not be drawn safely. 
I, therefore, repeated the experiments with pilocarpine in 1908. 
A concentration of 1 : 800,000 was found absolutely poisonous, 
so that a concentration of I : 1,000,000 is probably not far above 
the limit of toxicity. Solutions of a concentration of about 
I : 2,000,000 produce a more or less retarding effect upon the 
rate of regeneration. Weaker solutions of pilocarpine (1 : 3,200,- 
000) produce a distinctly stimulating effect upon regenerating 
worms, as will be seen from Table XXVII. 
TABLE XXVII 
SEPTEMBER 3-SEPTEMBER 13 (1908) | * NUMBER OF SEGMENTS AVERAGE 
| | ‘ 
; j fold 15/16)16\17|17|18|17|18|19)19|20|19|16]17|18)19|20|20|21/16|18] 17.2 
Pilocarpine 1 : 3,200,000 N 
\New | 3] 3) 3] 3] 3] 3] 4 4 
4| 4) 4] 4] 5 5] 5] 5 5) 5] 51 5] 5) 4-2 
) 
—— 
