25. 

 area and CO- production vary by differences of -8.8$ and -12.6$, suggesting that 

 the normal COo production of tadpoles in distilled water ia much more nearly 

 correlated with body weight than with area, as ie the caaa for <*arm-blooded 

 vertebrates. 



The next series (Experiment 17) was carried out in the same 

 manner. Carbon iioxiia proiaction *as determined over a period of eight days. 

 The large tadpoles usad in thia axpsriment were much larger than those used 

 in the preceding, and it was noticed that the/ frequently exhausted the supply 

 of oxygen in lbs air in the experimental Jars. Thia was evident because when 

 the jars were opened, although the temperature had remained constant, the lids 

 came off with a "pop", showing that a partial vacuum had been formed. The 

 tadpoles also had a tendency to float at the surface, as they had been observed 

 to do in low oxygen water. For thi 1 ? reason it was rather to be expected that 

 the C0« production of the largar si*e would be proportionately low, and this 

 ie found to be the case (Table 25). If now the large tadpoles be taken as 

 standard or 100$ in comparing the area, weight and C0« production of the three 

 ■ets, the C0 3 production of the second and third sizes will appear abnormally 

 hirh. Thus the difference between weight and C0« production are *6.8$ and 

 ♦4.2$ for the second and third sizes respectively, while the differences in 

 area ani CO^ production are -7.1 and -8.5. Despite the fast that the large 

 tadpoles in which COo production was abnormally low sere taken as standard, 

 the CO, production still corresponds more nearly to the weight than to the 

 volume. If, on the other hand, th? second size of tadpoles be taken as 100$, 

 the relative difference between weight and CO- production of tha third size is on- 

 ly -M. 6$, while the difference between araa and CO production is -10.7$, showing 

 again a very close correlation betveen weight and CO* production. 



At th« close of the eight days in diatillsd *ater tue CO- production 



m 



