The waterfalls are utilized at a few points to work up into wood pulp the forests of spruce which cover much of Labrador, Quebec and Ontario.
In Sweden, where wood pulp is made in enormous quantities, the manufacture of alcohol from the waste sulphite lyes is carried on, and it was estimated that in 1920 the probable capacity was in the neighbourhood of 8,000,000 gal.; the actual production, however, amounted to about 2,750,000 gal.
The commerce of the lake consists principally of coal, wood pulp and building material, besides general merchandise.
The most valuable trees for lumber are spruce, white pine, hemlock, cedar, white birch, ash, maple and basswood; all excepting pine and hemlock and poplar in addition are ground into wood pulp for the manufacture of paper.