164 JOSEPH HALL BODINE 
8. Rates of CO2 output differ for the different species of animals 
studied. 
9. Lighter and younger anmials have the higher rates of CO2 
output, and the possible relation of a surface law holding for 
grasshoppers is indicated. 
10. Temperature influences on the CO2 production are rather 
marked, higher temperatures cause increased rates of CO2 output 
and lower temperatures tend to have the reverse effect. How- 
ever, the temperature coefficients for these different temperatures 
are variable and are also considerably lower than those found for 
other biological processes. 
11. Starvation causes a decrease in the rate of COo output. 
12. Feeding starved individuals results in an increase in the 
rate of CO2 output. 
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