From A Guide to Old Stone Blast Furnaces of Western Pennsylvania by Sharp and Thomas, published in 1966 by the HSWP. I am going to abridge this entry a little....a scanner is on my wish list but it didn't arrive with Santa this year!! .....Buffalo Furnace was a charcoal furnace built in 1839 by P. Graff and Co. on Buffalo Creek at the crossing of the Kitanning and Butler Pike. Production was 45 tons a week and was the first furnace in the county to use hot blast. Another furnace was builtat the site in 1846. To reach the sites of these furances follow U.S. 422 west from Kittanning through Walkchalk to Worthington. In Worthington, turn right to the old highway which runs parallel to the new one but 100 yeards north, turn west on the old highway and go through town. At the foot of the hill, near the west side of the town, turn south on a road just before reaching the bridge over Buffalo Creek. On old white store building is on the left. Go down this road past a row of houses on the right(about 1/4 mile). Park and walk the last 200-300 feet. On the left, just beyond the bend are the depressions where the furnaces stood. The stones were removed and used for road repair. Lots of slag around.... Mimi Reed State College, PA.