326 JOURNAL OF FORESTRY 



tral States are practically free from the disease or under control. The 

 same may be said of the Lake States, although isolated infected locali- 

 ties were found. The Western States are still intact. 



In Canada the two infected provinces of Quebec and Ontario admit 

 the rust to be ineradicable. There have been three control areas estab- 

 lished, however, to determine whether white pine can be grown success- 

 fully in areas where the disease is present — to be sure, after eradicating 

 Ribes on the area (1.44 to 9.6 acres per man). 



The demonstrated fact that the distance of spread of the disease 

 from the currant is rather less than had been supposed (say, 200 yards) 

 countenances this experiment, but the spread from the pine reaches for 

 miles, as determined by observation in Dr. Spalding's contribution to 

 the bulletin. 



Experiments with sprays, reported in the bulletin, give promise of 

 cheapening the process of eradication, fuel oil seemingly being most 

 effective. 



Altogether it would appear that the combat against blister rust is not 

 as hopeless as was feared. 



B. E. E. 



