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At Chiloweyuck lake in the Cascade Mts, [[strikethrough]] s [[/strikethrough]] west [[circled]] the parallel [[/circled]] [[insertion]] ? [[/insertion]] the limit of the growth of underbrush in the forest, appears to be about 3000 feet above the sea level, though this may be accidental - on the streams, it certainly ascends higher. The actual line of [[underlined]] vegetation [[/underlined]], like that of rivers is too irreguler & dependent upon local circumstence - as to be defined. Grass & flowering plants were noticed as high as 8000 feet. The limit of [[underlined]] forest growth [[/underlined]] was here under 6000 feet, at which [[strikethrough]] height [[/strikethrough]] elevation the trees were stunted down to low bushes.  The [[strikethrough]] fs grown abries grandis [[/strikethrough]] The balsam firs &  pines reached the greatest altitude, [[underlined]] Abies Douglas[[strikethrough]] s [[/strikethrough]]ii [[/underlined]] & [[underlined]] Thuja ^[[insertion]] gigantea [[/underlined]] [[/insertion]]  giving out some distance below. [[underlined]] A[[strikethrough]] bies [[/strikethrough]] [[insertion strikethrough]] [[?]] [[/insertion strikethrough]] Menziesii [[/underlined]] was found at the lake, (2800 feet) 

Mr Custer, one of the [[strikethrough]] surveyors of the party [[/strikethrough]] topographers of the party, whose expeditions gave him an excellent opportunity for judging, came to the conclusion that the line where the timber ceases is unusually uniform through the whole range & that the disappearance is very rapid,  the trees maintaining quite a large size, though not so great an altitude, to within a short distance of the point where they dwindle down to mere shrubs. This was confirmed by my own observations. The [[underlined]] Thuja [[/underlined]] is the first to disappear, then the yellow fir ([[underlined]] Abies Douglas[[strikethrough]] s [[/strikethrough]]ii [[/underlined]]) The Hemlock reaches about the same or a somewhat greater altitude than this
last. The Balsam fir attains the greater elevation.

Underbrush extended to only [[strikethrough]] one [[/strikethrough]] 100 or 200 feet above the lake, although the same shrubs, in spots exposed to the sun, reach an altitude equal to that of the forest.

[[underlined]] Pinus Monticola [[/underlined]] first seen at the Lake - a very large one. 
[[margin]] Aug. 4. [[/margin]] [[strikethrough]] Just [[/strikethrough]] At camp Chuchchekum, [[strikethrough]] f [[/strikethrough]] (say 4000 to 4500 feet) first noticed [[underlined]] Picea Amabilis [[/underlined]], its cones having now attained [[strikethrough]] a [[/strikethrough]] full size. Thence on to the summit this & [[underlined]] Picea grandis [[/underlined]], with the hemlock, most abundant. The cottonwood also atains a fair size. A straggling alder at this altitude, procumbunt, abounded - This here called "black

Transcription Notes:
Ambrosia: Edited Pg1 in notes I've started a list of all the latin names of trees for volunteers to reference. philjterry: Edited - Chiloweyuck [now Chilliwack]