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Allegheny Portage Railroad
Allegheny Portage Railroad
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Individual Pictures (184)
A Model of a Canal Barge Aft Segment
A Model of a Canal Barge Bow Segment
A Model of a Horse-Drawn Railroad Car
A Model of a Packet Boat
A Model of Engine House Six
A Model of the “Lou Ann”
A Model of the Skew Arch Bridge
A Mottled Rock Surface
A Patch of Moss on a Rock
A Pennsylvania Railroad Caboose
A Pitted Concrete Surface
A Plan View Diagram of the Machinery in…
A Plaque for a Civil Engineering Landmark
A Railroad Car and a Safety Buck
A Railroad Car for Passengers
A Railroad Light
A Relief Carving of Stephen Tyng Mather
A Representation of Rope
A Rock Bed under Wood-Frame Tracks
A Rock Covered with Lichen Thalli
A Rock near the Roots of a Tree
A Rusted Cast Iron Chair Attached to a Stone…
A Rusted, Metal Rail Seated in a Cast Iron…
A Rusty Rail Secured in Stone Sleepers
A Safety Buck
A Sandstone Monument Protected by Chains
A Section of a Model Showing the Topography…
A Section of a Model Showing the Topography…
A Section of Wire Rope
A Section of Wire Rope and a Hanger
A Section of Wire Rope with a White Coating
A Segment of Fiber Rope
A Segment of Wire Rope
A Side View Diagram of the Machinery in…
A Side View of a Rope Model
A Slightly Closer View of a New Building…
A Small Creek near the Skew Arch Bridge
A Small Table in a Parlor
A Small, Wooden Railroad Car
A Stack of Logs
A Steam-Powered Locomotive Engine
A Stone Block with Two Anthropogenic Holes
A Stone Surface
A System of Sheaves, and Cogs, Connected…
A Table near a Bar
A Thorny Plant
A Traffic Light near a Tunnel
A Trail Sign
A Trail through the Woods
A Train on A Safety Buck
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