Fertility of Pediculus capitis. Particulars of the hatching of the eggs. 
Note. There is no necessary relation between the lice enieifiinf; on any particular day and the egg.s laid on any particular date. It was found impracticahle 
to keep the eegs laid on different days separate, they wore allowed to aceuinidate in the box with the laying $ until she was transferred to a new box. 
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