Grapu 2. Incubation period. 
TABLE 2—DISTRIBUTION OF THE EGcs AS TO NUMBER OF THE TOTAL EFFECTIVE DAY- 
Reciprocals of the periods plotted 
against average daily effective day-degrees. 
DEGREES ACCUMULATED DURING THE OBSERVED PERIOD 
Number of eggs 
Range of effective day-degrees 
35 
29 
119-128 
129-138 
149-158 
159-168 
169-178 
179-188 
189-198 
