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North Dakota Agricultural College.
BIOLOGICAL DEPARTMENT
H. L. Dolley,
PROFESSOR OF BIOLOGY
BOTANIST TO THE EXPERIMENT STATION

My Dear Sir:
The circular letter which accompanies this is perhaps self-explanatory.
Most work in connection with wheat rust has been done from the basis of local infection. My chief aim in asking the observation of men at the different stations upon the points mentioned, is to gain light upon the relationship of the uredospores to the "general infection"--In other words, may the spores from a particular locality, (say some southern state where the rust perhaps is perennial), infect in order of development all the wheat fields of the country, or is the chief source of infection local? Besides, such a simultaneous system of observation and reports must in itself develop many interesting general facts.