476 ILLINOIS STATE ACADEMY OF SCIENCE 



Total P. AA. N.Covnt. 



85,000. 

 80,000 

 75,000, 

 70,000, 

 6^000 

 60,000. 

 55000, 



P/otclX 



polymorplionuclear neiitropliiles, neiitropMlic myelocy- 

 tes, and remaining white cells is shown. This chart is the 

 basis for the first four graphs that follow. 



The first graph (Plate I) shows the Total White Blood 

 Count. The variability of the number of white blood 

 cells, a characteristic of this disease, is easily seen, es- 

 pecially in the period of most intensive observation, Jan- 

 uary 25 to February 18. The ray treatments are indi- 

 cated by the arrows. It will be noticed that after each 



