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cedar-trees, but they have no more relation to the cedar than an 
insect-gall has to the plant on which it is produced. To control 
this disease the planting of cedar-trees and apples near together 
should be avoided. 
Fie, 36. Gall-like growth of cedar-apple rust, 
“There is no loss without some gain,” and while the rusts 
attack many cultivated plants, bringing about immense losses, they 
also attack plants which are troublesome weeds in many places 
and doubtless assist to some extent in holding ne nee in 
ch 
THE Potato AND Its DISEASES. 
The potato represents one of our staple foods and there is 
probably no plant which is more susceptible to diseases of various 
