Brown,- — Studies in the Physiology of Parasitism. VIII. 119 
5. Indirect proof of the exosmosis of nutrient can be obtained by 
a study of the incubation times of infection in different cases. 
6 . The rate of exosmosis into drops containing Botrytis spores is 
identical with that into spore-free drops, up to and for some time after 
penetration by Botrytis has taken place. The rate of exosmosis then 
increases with great rapidity in the case of the infection drops. 
The writer wishes to express his indebtedness to Mr. S. G. Crater, of 
Rocky Mount, North Carolina, for his help fri the experiments dealing with 
the effect of age on the permeability of petals, as described on p. 104, and 
also for repeating and verifying a number of other results. 
