404 



ture readings increases, and vice versa.) Various curves were thus tried 

 until the velocities shown in Table V were found to give fairly consistent 

 results. The use of the velocities shown in Table V gave calculated time 

 for Glenn's data consistent with the average actual time. There was, 

 however, much greater variation than in other stages. This has been 

 discussed in PART ONE and PART TWO. 



Table XX. Shoiving conditions and incubation period of eggs under approxi- 

 mately constant temperatures. 

 The original data are from experiments by C. S. Spooner. 



