T 4 
Journal of Agricultural Research 
Vol. XI, No. i 
below the area studied and well inside the mature stand of timber; 
yet the white-pine reproduction is found up to the highest points of the 
burn, which are from 800 to 1,000 feet above where the green white- 
pine trees were found (PI. 4, A). It is very evident, therefore, that 
the white-pine reproduction could not be due to seed produced by the 
seed trees remaining after the fire, but must have sprung up from the 
seed in the ground that survived the fire. Seed trees of the other 
species were found on the edge of the remaining green timber at higher 
elevations than the burn, and therefore could bring about the restocking 
of the ground by these species. Since, however, the influence of seed 
trees on the 1910 burn, which reburned a portion of this 1902 burn, was 
found to be very local, the part which the seed trees played after the 
first bum in restocking the ground becomes questionable (PI. 4, B). 
The effect of the seed trees of the different species on the second bum 
is shown in Table V. As can be seen from this table, the influence of 
seed trees extended only for from 2 to 4 chains. 
Tabi^ V .—Distribution of seedlings on Cowlitz area after the burn of igio 
Number of seedlings per acre. 
Species. 
Average 
of 1 and 2 
chains from' 
seed trees. 
Average 
of 3 and 4 
chains from 
seed trees. 
Average 
of 5 and 6 
chains from 
seed trees. 
Average 
of 7 and 8 
chains from 
seed trees. 
Douglas fir. 
280 
240 
40 
40 
Noble fir. 
80 
0 
0 
20 
Western hemlock. 
I, 640 
120 
80 
0 
Western red cedar. 
2, 120 
200 
40 
0 
None of the white-pine seed trees left on the 1902 bum which might 
have influenced the area of the 1910 bum were killed by the 1910 fire, 
though it burned closer to them than the 1902 fire. Yet no white-pine 
seedlings followed the 1910 burn, while white pine reproduction of all 
age classes came in on the 1902 burn. This would indicate that the seed 
trees had little influence on the restocking of the ground after the 1902 
fire. 
Mount Adams burn. —Northward and westward from Mount Adams 
there lies an extensive stretch of burned country, embracing altogether 
no less than the equivalent of three full townships, and probably much 
more. The greater part of this area was apparently only once burned 
and is now a standing forest of weather-bleached snags. The rest of the 
area represents a much older burn. It bears evidence of being irregularly 
reburned and includes large barren stretches of semiarid appearance with 
only decayed stumps and the crumbling remains of logs to suggest the 
existence of a former forest. 
