704. Allegheny Tunnel
Object type: Stereograph
Department: Photographs
Artist: Purviance Philadelphia|Unknown
Artist bio: American| 
Artist role: Publisher|Artist
Artist nationality: American| 
Date: 1860s–80s
Medium: Albumen silver print
Dimensions: Approx. 3 1/2 × 7 in. (8.9 × 17.8 cm)
Classification: Photographs
Credit line: The Jefferson R. Burdick Collection, Gift of Jefferson R. Burdick
Accession year: 1963