430 EFFECT OF TEMPERATURE UPON FACET NUMBER 



Facet DacjS 

 number 



240 



32 



210 28 



180 24 



150 20 



120 16 



90 12 



60 8 



30 4 



1,000 



T 



1.000 



F 



0.020 



0.125 0.015 



0.100 



0.075 0.010 



0.050 



0.025 0.005 



15' 



20^ 



25" 30' 



Temperature 



Fig. 10. The Low Selected bar stock facet curves superimposed on the curve 

 for the length of development of the immature period. These curves are thrown 

 into juxtaposition by arranging the values so that the developmental curve A 

 lies about half way between the male facet curve B and the female facet curve C. 

 The reciprocal curve E for the rate of development and the reciprocal female 

 facet number curve F are likewise brought into comparison by arranging the 

 values for each. 



