etno 



M-liieli occurs in vitrification l)ut that it is destroyed by 

 the molecular rearrangement which takes place in crys- 

 tallization. 



Furthermore, a considerable decrease in molecular 

 motion has no injurious effect on living matter (cf. Lip- 

 man and Lewis, 1934). In the present state of our knowl- 

 edge the influence of temperature on life can be repre- 

 sented diagrammatically as in the accompanying figure. 



Upper 



Lethal 

 Zone 



Optimal 

 Zone 



Dangerous 

 Zone 



Safe 

 Zone 



(No Lower 

 Absolute 



Limit 



-"W 

 - Coagu- 

 ation 



- Active 



Life 

 1-0° 



Freezinf 



-100 



Latent 

 I- Life 



-200° 



Limit ) 

 Zero 



Fig. 32. Diagram iUustrating the influence of temperature on vital 

 processes. 



While apparently one can always kill protoplasm by rais- 

 ing its temperature, that is, by increasing its molecular 



