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history of pennsylvania

new york public library

pennsylvania

philadelphia pa

robert dennis collection of stereoscopic views

safety

steam

stereoscopic views

safety valves

public
4 media by topic ∙ page 1 of 1
Steam stops and safety valves. Philadelphia PA. 19th century stereoscope card.

Steam stops and safety valves. Philadelphia PA. 19th century stereosco...

Philadelphia stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who... More

Steam stops and safety valves. Philadelphia PA. 19th century stereoscope card.

Steam stops and safety valves. Philadelphia PA. 19th century stereosco...

Philadelphia stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who... More

Steam stops and safety valves. Philadelphia PA. 19th century stereoscope card.

Steam stops and safety valves. Philadelphia PA. 19th century stereosco...

Philadelphia stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who... More

Steam stops and safety valves. Philadelphia PA. 19th century stereoscope card.

Steam stops and safety valves. Philadelphia PA. 19th century stereosco...

Philadelphia stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who... More