CATALASE CONTENT 



147 



Figure 3 shows graphically the results of such experiments. 

 In general it is found that catalase content falls during successive 

 periods of starvation. Such a result is quite in agreement with 

 that of the above-mentioned authors. 



It has also been pointed out^ that during starvation in grass- 

 hoppers the rate of CO 2 output decreases during successive 

 periods of starvation. Here again as in the preceding paragraphs 



♦ -normals 

 0-24 hrs starv 



Body wl.mgs. 



Fig. 3 Curves and points show the relative amounts of catalase in normal 

 grasshoppers and in those starved for varying periods of time. Abscissas repre- 

 sent body weights in milligrams. Ordinates represent number of cubic centi- 

 meters of oxygen obtained per gram body weight per minute. Based on some 

 150 separate determinations. For further explanation see text. 



one cannot necessarily conclude that this apparent parallelism 

 between the CO 2 output and catalase content show^s the two 

 to be definitely related. Much further quantitative data seem 

 to be necessary before such a theory can be definitely established. 



