32 BULLETIN 1200, U. S. DEPARTMENT OF AGRICULTURE. 
lines dense stands of reproduction were encountered more than half 
a mile from green timber, either on moist north slopes or in ravines. 
As these lines crossed dry, exposed slopes or ridges the reproduction 
became sparse. In some localities seedlings were found either 
under logs, in hollows, or in other places where there was moisture. 
The density of reproduction at long distances from green timber was 
in some places greater than near it. Where the transect lines passed 
through the 1902 burn into a patch of timber that had been killed 
by the 1918 fire, and through it into the 1902 burn again, the same 
conditions prevailed in approaching and leaving the timber killed 
in 1918 as were found where the lines approached green timber on 
the edges of the burn; that is, the reproduction was usually found 
from 1 to 3 chains from the edge of the timber killed in the 1918 fire. 
Dense stands of young growth were found in the areas of timber 
Timber killed by 1902 Fire Green Timber left by Fire Timber killed by 1902 Fire 
Reburned July 1918 ne Reburned July 19's 
aN 
tS, x : 
St RAG 
Wuite 
70 | 0} 0} O| AO] O 1180} 620;1280)11Z0 16080 %680,7740|880 | 240, 80) O | O | O ie Oe 
1 | | | . 
“Number of Seedlings | 
per. Acre,in each chain a hee 
distance. | | | | 
\ 
es) 
Chains Distance | | | | 
trom Green Timber. 
lo | 9 | Bal OU L7F Bm 9st 1O 
Sa ee 
ae | | 
| 
Fic. 6.—Effect of reburning. An area in the Cispus burn of July, 1918, that was re- 
stocked from seed stored in the forest ficor near seed trees left by the 1902 fire. 
There were no seed trees within three-fourths mile after the fire of 1918. Young 
growth that followed the 1902: fire had not reached seeding age in 1918. Such areas 
were not restocked after the second fire. 
killed in 1918; and, as the lines left the killed timber on the opposite 
side, the same conditions were found to be repeated in inverse order. 
until practically no reproduction was found out in the 1902 burn. 
Rig: *6" } | 
These phenomena are explained by the principles already dis- 
cussed; that is, the reproduction in this case came entirely from seed 
stored in the forest floor. There was no possibility of seed coming 
from cones; there was no evidence of seeding from the remaining 
timber; consequently, the only other source of seed was the forest 
floor. The young growth around the edges of the timber killed in 
1918 shows the zone of seeding from this green timber before the 
fire. Although there was no litter and duff in this area, the loose 
soil covered some of the seed, and large quantities were undoubtedly 
buried by rodents. 
An area in the Wind River Valley of southern Washington, where 
the timber had been killed by the Yacolt fire of 1902, was covered 
