LATE POTATO BLIGHT IN IOWA 



llrumnv Table. 



(Des Moines st<ition.) 





It will be noted from this table that the humidity fa 

 is much more constant than thai of rainfall. In all of the 

 months in all three years, the humidity runs abnormally high 

 even in the months in which the rainfall was deficient. 



The conditions with regard to humidity are more clearly 

 brought out in relation to the different stages of the develop- 

 ment of the disease when presented by decades. 



-1903 

 ?\8BS 



1915 



Jur\e lultj Auqust 



Fir. 50 — Per cent of humidity by decades of each month. Pes Moii 



Without reviewing the decades of each month in detail, spe- 

 cial attention is called to the high degree of humidity for the 

 third decade of July in 1885 ami 1915. For tie' year 1903. 

 this high stage of humidity came a little later and was re) 

 during 1 the first decade of August. 



