PLATE 2 
EXPLANATION OF FIGURES 
5 A smear of the fluid during the third stage, from animal 1104 9 . This 
shows the arrival of myriads of leucocytes among the epithelial cells in the 
vaginal fluid. Such an appearance is characteristic of the third stage. 
6 A more highly magnified View of the same stage showing in clearer detail 
the cell structures. 
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