This is a sandstone wall. The joints, between the stones, are filled with mortar. The Lemon House is listed on the National Register of Historic Places, as part of the Allegheny Portage Railroad National Historic Site.Galleries:Allegheny Portage Railroad, Stone WallsKeywords:allegheny portage railroad, gallitzin, lemon house, masonry wall, pennsylvania, sandstonePhoto Location: Allegheny Portage Railroad National Historic Site, PennsylvaniaPhotographer: Dr. Roy WinkelmanDate of Photo: 11/25/2011Device Make: CanonDevice Model: Canon EOS 5D Mark IIOriginal Dimensions: 5616×3744Picture Orientation: LandscapeGPS Coordinates: 40°27'22.95"N 78°33'05.76"WPicture Number: 15784
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