64 
Experiments at temperatures above 40° have not yet been made; 
it is probable that the value recorded for the rate of growth at 
40° must already in part be attributed to the time which elapses 
hetween the determination of the initial length and the establishment 
of thermal equilibrium. Such observations above 40° will have to 
be made microscopically. . 
The results become still clearer by graphic representation in figs. 
4 and 2. Here the abscissae indicate temperature, the ordinates the 
erowth in m.m. In fig. 2 the curves from 27° onwards have been 
drawn on a larger seale, in order to make more evident the falling 
off of the rate of growth at higher temperatures, with increased 
duration of the experiment. The dotted line in fig. 2 records the 
4 
â 
pn ™ 
Growth in m.m. 
TABLE III. 
Temperature coefficients 
for experiments 
of 314 hours 
zt 
ee 
a 1.9 
ce 
2520.6 
20 het 
