8 
Journal of Agricultural Research 
Vol. XI, No. i 
found that the proportion of age classes is practically the same as in 
the central section, over 90 per cent being in the 11-year-old class. 
The distribution of the age classes with reference to seed trees was 
found to exhibit the same peculiarities as were found in the section— 
namely, the seedlings under 5 years old are found only in the vicinity 
of seed trees, seedlings from 6 to 10 years old are more widely distributed 
over the bum, seedlings 11 years old are found everywhere in the bum 
where noble fir formerly grew, often forming dense stands at great 
distances from seed trees that survived (Table III). 
These facts show clearly that all the young growth could not have 
come up from the seed scattered by the seed trees which have survived 
the fire. The restricted distribution of the youngest seedlings, which 
so definitely points to their having originated from the seed trees, makes 
it impossible to attribute all of the older classes to the same source. 
Had both classes come from the same seed source they would of necessity 
have exhibited the same distribution. 
Silver fir. —The silver-fir records resemble in every respect those 
of the noble fir. In the same groups with the noble fir there are some 
silver-fir seed trees, the influence of which is about the same as described 
for the noble fir. The silver fir is found on all sites in the township 
where it occurred in the forest before the fire, although the silver-fir zone 
is still more limited than that of the noble fir to higher elevations and 
cooler slopes. 
Western hemlock. —The area studied as a whole is above the western 
hemlock zone, but young growth occurs in several localities, although 
usually in sparse stands. The important point about the hemlock 
reproduction is that burned hemlock trees were found in every locality 
where stands of hemlock reproduction occurred, and the relative pro¬ 
portion of hemlock reproduction to other species is approximately the 
same as the proportion of hemlock in the original forest. For example, 
the transect running from the northwest comer of the section goes 
through a dense stand of hemlock reproduction at about half a mile 
from the nearest green timber. This is a favorable hemlock site, and the 
burned forest consisted of approximately 10 per cent of hemlock. This 
same circumstance is again evident on the southeast transect at approxi¬ 
mately half a mile from the nearest seed trees. On this transect it is also 
important to note that the heavy stand of reproduction does not continue 
to the green timber; on the contrary, there is practically no reproduction 
for 20 chains from the green timber. These facts argue strongly against 
the theory that the seed source of such isolated reproduction is the green 
timber which escaped the fire. 
Western WHITE pine. —Western white pine does not naturally form 
pure stands in the Cascade Mountains of Washington; but individual 
trees or very small groups of this species do regularly occur in the forests 
throughout the region. The section and township data for white pine 
