406 MINNESOTA BOTANICAL STUDIES 



leaf tissue is evident in carnation. However, further experimental 

 data on the relative rate of water loss as well as a study of the cyto- 

 morphology of the diseased leaves is necessary before conclusions 

 can be drawn. 



The writer is indebted to Dr. F. E. Clements and Dr. E. M. 

 Freeman for suggestions and efficient criticism throughout the course 

 of the work. 



LITERATURE CITED 



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 Wirkungen des Kampfers auf die Pflanzen, inbesonders auf 

 Laubesprosse. Verb. Zool.-bot. Ges., Wien, 34 : 543. 1884. 



3. Livingston, B. E. Operation of the porous cup atmometer. 

 Plant World, 13: 111-119. 1910. 



4. . Evaporation and plant habitats. Plant World, 



11:1-10. 1908. 



5. . Relation of transpiration to growth in wheat. 



Bot. Gaz. 40: 178. 1905. 



6. Reed, H. S., and Cooley, J. S. The effect of Gymnosporangium 

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7. Reed, H. S. The effect of certain chemical agents upon the 

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8. Reynolds, E. S. Relations of parasitic fungi to their host plants. 

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