yellow birch, sugar maple and beech have to a considerable extent supplanted spruce, white pine and hemlock, and that wherever forest fires have occurred there is much bird cherry, yellow birch and aspen.
Much splendid timber has been needlessly destroyed, chiefly by forest-fires, but also by improvident farmers in their haste to clear the land.
To this fact it owes its immunity from the forest fires which wreak frightful havoc among the surrounding forests.
Wisconsin had several times been visited by disastrous forest fires.
Large areas have been burnt by uncontrolled forest fires and uneven regeneration of the forest renders the park particularly susceptible to any disturbance.