By 1920, the seemingly endless forests had become history, and in hundreds of lumber towns as the last, solitary log was moved up the jack ladder, the sawmill whistle was given a long, lonely, final blast, which signaled the closing of the mill and the end of an era. Loggers moved to West Virginia and to the lake states, leaving behind thousands of devastated treeless acres. Today, after decades of regeneration, Pennsylvania's forests are once again green, healthy, and of great economic and esthetic value. However, unlike the pine and hemlock forests of our forefathers, timber stands now consist primarily of hardwoods.