50 High Points
Pennsylvania - Mt. Davis (3,213') - November 29, 2003; July 10, 2015
Pennsylvania - Mt. Davis (3,213') - November 29, 2003; July 10, 2015
Just beyond the USGS bolder there is a large grouping of boulders, many of which have informative placards mounted on them. I didn't read them all but these three were interesting. The sign reads: The last kiln on Negro Mountain was abandoned about 1835. Kilns were used to extract Pine Tar from Pitch Pine. Dished stones similar to the one found just off South Wolf Rock Road, were the bases of tar kilns. Pitchy sections of resinous pine, including knots and cones, were stacked on these stones, then covered with earth and wet leaves. The stack was ignited. The heat caused the pitch to ooze out of the pine onto the stone and run off along the collecting groove to where it was gathered.