148 Salmon.— Cultural Experiments on Erysiphaceae. 
(e) Conidia produced on barley leaves (attached to plants growing in a pot) 
previously immersed for 1 minute in water at a temperature of 50° C. 
Experiment No. a 040. Conidia produced on the ninth day were 
sown in considerable quantity, at a marked place, on two barley leaves and 
on one wheat leaf. By the eighth day a vigorous powdery patch of Oidium 
was produced on the wheat leaf ; no trace of any infection occurred on the 
two barley leaves. 
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2 37 j 238. 
5. Buchner, H., 1900 : Immunity. Encyclopaedia Medica, v, 160, 161. 
6. Ray, J., 1903 : Etude biologique sur le parasitisme : Ustilago Maydis. Comptes Rendus, 
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7. Janczewski, E., 1894 : Recherches sur le Cladosporium herbarum et ses compagnons habituels 
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