BULLETIN 152, U. S. DEPARTMENT OF AGRICULTURE. 
and lumber. Several other species produce fully as good tan bark 
or extract in a shorter time. Nevertheless hemlock will undoubtedly 
persist in the old-growth forests and natural second-growth in many 
Fig. 1.— Botanical distribution of hemlock. 
regions, and its presence in these stands may be of decided benefit to 
them. For this reason it must be considered in forest management. 
GEOGRAPHICAL RANGE. 
Hemlock finds its home in the white pine region of eastern North 
America. This also is the region inhabited, by the characteristic 
