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1913] COOPER—ISLE ROYALE 209 
Though there is little pure bog forest upon Isle Royale, there 
is abundance of a very characteristic type which may be called 
“impure” bog forest; that is, forest composed of a mixture of bog 
_and climax trees. Upon Raspberry Island it is poorly developed, 
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Abies balsamea A 14 
Pyrus americana O 
ge 45-—Quadrat ro: bog near Park Place Hotel; for explanation of symbols 
see fig. 6, : 
but there is an excellent sample near the Park Place Hotel on Rock 
Harbor (Sec. 3, T. 66 N., R.33 W.). A quadrat in this locality was 
Studied and the results are shown in fig. 45. The oldest trees here 
were the three tamaracks, and they were also much the largest, 
being 2:75-5.25 dm. thick, and towering above their companions. 
