The Dynamics of Cell-Division. 



119 



Q10 Q10 



Mitotic Stage. 



Velocity at 20° C. Velocity at 30 0 C. 

 Compared with Compared with 

 Velocity at io° C. Velocity at 20 0 C. 



1. Early prophase 



2. Early prophase 



-1. 1340 (.8818) 



+ 1.1525 

 +4.9406 

 +2.6404 

 +2.7593 

 +3.0663 

 +2.3440 

 +2.7571 

 +2.6038 

 +2.1694 

 +3093 1 

 +4-9463 

 +3-23H 

 + 1.3962 



3. Mid-prophase or spireme 



4. Late prophase 



5. Metaphase. . . 



+2.6832 

 +2-9599 

 +I-3859 

 +1.407 1 



6. Early prophase 



7. Mid-anaphase . 



8. Late anaphase. 



-1. 1701 (.8546) 



Stages 2 to 10 inc. 

 Stages 1 to 10 inc, 



9. Eaily telophase or di-spireme 



10. Late telophase 



Resting or metabolic 



+ 1.1523 

 +1-6334 

 + 1-3329 

 + 1.1240 

 + 1.2215 

 + 2.0476 

 + 1.1990 



Entire cycle, i. e., the 1 resting and the 10 active 



stages 



+1.2139 



+2.6218 



Next we shall list and classify according to the sign of their 

 temperature coefficients such other elementary and complex 

 physical, chemical and physiological processes as have been de- 

 scribed in the literature of the subject, and which may throw light 

 upon the nature of the temperature-reactions shown in the above 

 table. 



A. The following forces and processes within medium ranges of 

 temperature (5 0 C. to 35 0 C.) react in the positive direction to 

 temperature-increments, that is, they have the <2io value with the 

 + sign : 



1. Velocity of chemical reaction. 



In homogeneous reactions Qio = + 2.0 to + 3.0. 



2. Osmotic pressure. (Always low in colloids.) 



3. Plasmolysis. (Protoplasmic permeability.) 



4. Diffusion of fluids. (Always low in colloids.) 



5. Electric conductivity of solutions. 



6. Migration rate of ions. 



7. Ionization. 



8. Rate of conduction of nerve impulse. 



9. Rapidity or rhythm of electric phenomenon. 



10. Velocity of protoplasmic streaming. 



11. Coagulation. 



1 Loc. cit. 



