12 BULLETIN 1186, U. S. DEPARTMENT OF AGRICULTURE. 
One small 28-year-old experimental plantation at Jelsa had 100 per 
cent of the trees attacked by the blister rust and 6 per cent already 
destroyed. None of the remaining trees will make merchantable 
timber. 
Fig. 3—A white-pine tree growing near black currants at Bagley Wocd, near Oxford, 
England. This tree illustrates the typical appearance of white pines in a 12-year-old 
plantation in which 95 per cent of the trees are attacked by blister rust. Each limb 
shown here, as well as the trunk, is diseased. 
DENMARK. 
The white-pine blister rust has been known on the island of Born- 
holm, Denmark, since 1890, when Rostrup collected the first infected 
twig at Almindingen.’? Since that date the disease has become preva- 
19 Pathological collection, Royal Agricultural College, Copenhagen. 
