Bui. 166, U. S. Dept. of Agriculture. 



Plate I. 



Fig. 1.— P + = Seromucous discharge with 

 purulent flakes. 



Fig. 2.— P+ + = Distinct purulent discharge. 



Fig. 3.— P + + + = Purulent discharge with 

 swelling of the eyelids. 



Fig. 4.— P + + + + = Strong purulent dis- 

 charge with swelling and gluing together 

 of both lids. 



Varying Degrees of Reactions in the Ophthalmic Mallein Test for Glanders. 



