Stereo analysis
AnalyzedVerdict
Genuine stereo pair97%
The two photographs contain the viewpoint difference needed to produce genuine depth.
- Depth spread
- 8px
- The range of horizontal difference between the two views. More spread generally means more depth; 0–1 px usually indicates a monoview.
- Match
- 78%
- The share of usable picture detail that can be matched between the left and right views. A higher number means a more reliable comparison.
- Vertical
- 2px
- Vertical drift between matched details. Lower is better; 4 px or more can indicate camera movement, scan skew, or poor alignment.
A stereoscopic view down a long machine-shop aisle, with lathes and other machine tools arranged on either side. Stepped pulleys crowd the foreground, while flat drive belts cross beneath exposed roof timbers and descend from overhead shafting. Bands of light fall across the plank floor.
A moustached worker stands beside a foreground lathe with one arm resting on the machine. Other men appear among the equipment and near the edges of the view. The open aisle provides a clear line through the closely packed machinery, with the paired images emphasizing the depth of the shop.
The reverse bears the printed credit of A. D. Harding, 42 Main Street, Susquehanna, Pennsylvania, together with an advertisement for stereoscopic views of local scenery. An ink caption names the “Machinery Department”; a separate pencil inscription identifies the scene as the Erie Locomotive Works at Susquehanna. This site identification comes from the annotation, not from signage visible in the photograph.
The two brown-toned images are mounted on a cream card with rounded corners. No date is supplied, and the workers remain unidentified. The authors and dates of the manuscript captions are unknown; the photographic process cannot be established from the scans alone.
- Medium
- Stereoview
- Subject
- Occupational, Railroad
- Condition
- Light toning and scattered small spots to the mount, more apparent on the reverse, with minor edge and corner wear. The image areas retain strong contrast and substantial machinery detail, with a few small pale specks and surface marks. The printed imprint and ink caption are clear; the pencil identification is lighter but legible.
- Provenance
- Printed verso imprint credits A. D. Harding, 42 Main Street, Susquehanna, Pennsylvania. Ink and pencil subject captions are also present, but their authors are unidentified. No ownership history is documented.
- Catalogue no.
- MSV1732
Catalogue details
Location
Erie Railway Susquehanna Shops, Machine & Erecting Shop · Susquehanna, Pennsylvania, US
Photographed subject · Exact site · 80% confidence
The listing title identifies the works at Susquehanna, and the Library of Congress HAER survey documents the Erie Railway Susquehanna Repair Shops Machine & Erecting Shop on the north side of Main Street, extending southwest from Exchange Street, Susquehanna, PA. Pin marks the documented shop site.
Source: Library of Congress HAER PA-1259
