DETERMINATION OF CRITICAL POINT OF DEATH 175 



in the plant, this rigor of death is succeeded, after a time, 

 by passive relaxation of the tissue. 



The thermo-mechanical curves of two similar specimens — 

 that is to say, two specimens of the same plant, having the 

 same previous history — are found to be practically identical. 



Different plants have different characteristic curves. The 

 curve of the same plant also exhibits a variation of its 

 characteristics under changed conditions of age, experiment, 

 and previous history. 



