No. 408.] EFFECT OF HEAT UPON GROWTH. 957 
conclusion reached above (2), víz., that it is chiefly the im- 
bibitory process which is accelerated by heat, is thus further 
strengthened. 
5. Organisms reared in the warmer conditions tend to attain 
a maximum percentage of water slightly higher than that 
reached by those reared at a lower temperature. This fact 
accentuates the conclusion reached in 4, in that a shorter time 
is required to accomplish a greater result. 
6. On the other hand, it appears (see Figs. 1 and 3) that 
the lower temperatures allow the attainment of a somewhat 
greater maximum total weight, no extraneous food being sup- 
plied. The significance of this is not apparent. It is possibly 
due to the albuminous food material in the egg envelope being 
better preserved, and hence more completely available as food 
after hatching, than at the higher temperatures. 
7. Finally, the individuals which were subjected for seven 
days to a temperature of 12°-15° and were then placed in a 
warm chamber, showed a greater rate of increase of imbibition 
water than those reared in the warm chamber from the begin- 
ning (Figs. 1 and 2). This indicates a tendency compensatory 
for early unfavorable circumstances, — an instance of the well- 
known regulative capacity of organisms. 
