146 



JOSEPH HALL BODINE 



If the theory is correct, that catalase content and CO2 out- 

 put are definitely related, these hibernating individuals ought 

 to show greatly reduced amounts of catalase. Figure 2, however, 

 shows that the catalase contents of hibernating and growing 

 individuals of the same body weights are practically identical. 

 Results somewhat similar to the above have been reported 

 by Stehle and McCarty^ for cats and rabbits. 



Fig. 2 Curves show the relative amounts of catalase in normal and hiber- 

 nating grasshoppers of different weights. Solid line, normal animals. Broken 

 line, hibernating animals. Abscissas represent body weights in milligrams. 

 Ordinates represent number of cubic centimeters of oxygen obtained per gram 

 body weight per minute. Based on 315 separate determinations. 



EFFECT OF STARVATION ON CATALASE CONTENT 



Inasmuch as Burge and Neill" have shown that starvation 

 in higher forms results in a decrease in catalase content, it is 

 of some interest to see in how far such results can be produced in 

 insects. 



Groups of grasshoppers were starved for varying periods of 

 time up to 144 hours and catalase determinations made at 

 twenty-four-hour intervals. Determinations on normal animals 

 (those fed) and experimental ones were carried out at the same 

 time, using the same sample of peroxide. 



