376 



HUMionr 30-100 hcmss 



Hunwni ao-63 netN-as 



20 — 



30 1 i 



l-/r^- 



HunwiTY 10-13 nem-ii 



HUMWlTY-60-63 lt£M-63 



HUnWITY 50-53 »£/\N-S2 



HUmOlTY 40- 43 M£M-43 





Human V 30-33 HEAN-33 



HUMIDITY I4-Z3 MEAN-21 



Pig. 9. Curves showing percent failure to pupate under various conditions 

 of temperature and humidity. The circles indicate actual observations and 

 the crosses indicate averages. Circles with crosses inside are single data for 

 the temperature in question. The curves pass through the average of the 

 crosses as well as it was possible to make them. This relation was improved 

 l)y smoothing the curves shown on Fig. 10. 



