340 



SERGIUS MORGULIS 



increase of the percentage of water shown in this experiment is 

 concomitant with a progressive loss of substance on the part of the 

 regenerating worms, as was also observed in the previous experi- 

 ments. 



Second series 



Experiment D. In this series of experiments the proceedure was 

 precisely the same as in the first series, except that food was sup- 

 plied to the regenerating worms. The experiment was started on 

 August 4, and all the data will be found in table 4. 



TABLE 4 



As soon as the worms to be studied in this experiment were 

 operated on, two samples, each consisting of 50 specimens, were 

 weighed and dessicated. The per cent of the water content thus 

 determined was 76.03 in the first sample and 75.85 in the second. 

 These determinations are only slightly different, and the average 

 between them — 75.94 per cent — will be assumed as the standard, 

 with which the further determinations, made generally every five 

 days, will be compared. It will be seen at once, by looking through 

 the appropriate column in the table, that the per cent of water in 

 the regenerating worms increased steadily up to the fifteenth 

 day, when the maximum of 79.16 per cent wasfound; after that the 

 per cent of water began to decrease, being 78.25 per cent at twenty 



