6 THE ADIRONDACK SPRUCE 
Spruce, Hemlock, Balsam, the Maples, Beech, and Birch 
are tolerant. White Pine is intermediate, and the re- 
mainder of the trees are intolerant of shade. A pro- 
visional scale of tolerance is as follows, beginning with 
the species which demand most light : —Tamarack, Pop- 
lar, Bird Cherry, White and Black Ash, Black Cherry, 
White Pine, Birch, Soft Maple, Balsam, Spruce, Hem- 
lock, Beech, Hard Maple. These species occur in mix- 
ture of varying proportions, the preponderance of one 
tree or another depending primarily on the situation 
and soil. 
In general, the forest may be divided into four dis- 
tinct types, named from thesituations where they grow; 
Swamp land, Spruce flat, Hardwood land, and Spruce 
slope. Further subdivision would be possible, but it 
is unnecessary for the purposes of this report. 
From an examination of the land, from the topographi- 
cal map, and from the 1046 valuation surveys, these four 
classes of situation are estimated to have approximately 
the following proportion in the Park : 
Swamp lands, 22 per cent. 
Spruce flats, 10 per cent. 
Hardwood lands, 42 per cent. 
Spruce slopes, 26 per cent. 
An excellent mental picture of the forest may be ob- 
tained from the following table, which gives for each 
species the average number per acre of trees over ten 
inches in diameter breast high, and the percentage of 
each species in the mixture, as well as the average and 
maximum diameters. These figures represent the aver- 
