388 CIR. 211, U. S. DEPT. OF AGRICULTURE 
Asia on nursery stock in the early nineties, and the 
white-pine blister rust introduced from Europe 
within the last 30 years. The blister rust has be- 
come established in the Northeast, the Lake States, 
and in the western white pine region. Its threat to 
many millions of dollars’ worth of valuable white 
pine, in both public and private ownership, has be- 
come acute. With the cooperation of the Bureau of 
Plant Industry, efforts are being made to check the 
disease by the eradication of all currant and goose- 
berry bushes within or near stands of white pine, as 
the blister rust spreads from these bushes to the pines. 
The chestnut appears to have been hit by the chestnut 
blight throughout the range of the tree. No effective 
means of control have as yet been discovered. Efforts 
are being made to find and establish a blight-resistant 
strain of chestnut. 
THE EXTENSION OF FORESTRY 
PRACTICE 
The greatness of the national-forest enterprise and 
the prominence accorded its accomplishments have 
given the impression to some that the problem of . 
forestry is solved. In point of fact, this is by no 
means the case, for the national forests contain only 
about one-sixth of the forest area of the country and 
not quite one-fourth of the standing saw timber. Pri- | 
vate owners hold almost four-fifths of the timberland 
of the United States. A small amount is in national 
parks, military and Indian reserves, State and mu- 
nicipal parks and forests, and the public domain. The 
amount of lumber which is actually placed on the 
market from the national forests amounts to only 
about 41% per cent of the entire consumption of the 
country. The rest comes from private lands. While 
the proportion will be altered in the future, the 
country must still look to private lands for a large 
part of its forest supplies. 
The forests of the country that are in private hands 
have been undergoing depletion with great rapidity. 
Conditicns are changing, however, and private owners 
