Stereo analysis
AnalyzedVerdict
Camera moved / alignment issue85%
The pair does not align reliably enough for a trustworthy depth reading; scan skew can also contribute.
- Depth spread
- 7px
- The range of horizontal difference between the two views. More spread generally means more depth; 0–1 px usually indicates a monoview.
- Match
- 100%
- 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
- 7px
- Vertical drift between matched details. Lower is better; 4 px or more can indicate camera movement, scan skew, or poor alignment.
A crowd gathers outside a wooden building beneath three adjoining pitched roofs, with horse-drawn carriages drawn up along the unpaved street. The central sign reads “CHRISTIAN WORKERS.” Beyond the building, houses, trees, and larger commercial blocks extend toward the horizon; moving traffic is blurred in the foreground.
The mount identifies the occasion as the “13th Annual Minnesota State Sabbath School Convention.” Its side imprints credit “Charles A. Zimmerman, Photographer” at Third Street, St. Paul, Minnesota. The caption establishes the event, but neither its date nor its precise venue is given; the photographer’s St. Paul address does not by itself establish the location of the scene.
The reverse advertises “Merrill’s Collection of Minnesota Views,” supplied to the trade by D. D. Merrill, Randall & Co., 166 Third Street, St. Paul. Its unnumbered list includes “St. Paul and its Surroundings,” “St. Anthony and Minneapolis, and All About the Falls,” and “Minnehaha—Foliage and Ice.” Although the advertisement states that most views are numbered within the picture, no publisher’s image number can be securely matched across these scans.
The paired, arched-top photographs are mounted on a buff card measuring 6.93 × 3.48 inches (176.1 × 88.5 mm), as supplied by the owner. A pencil notation on the reverse reads “110.2”; its purpose is unidentified. Clean and otherwise sound overall, with no visible cracks, substantial losses, or strong staining.
- Title on card
- 13th Annual Minnesota State Sabbath School Convention.
- Medium
- Stereoview
- Subject
- Faith, Minnesota, Outdoor Scene
- Dimensions
- 6.93 × 3.48 in (176.1 × 88.5 mm)
- Condition
- Clean and otherwise sound overall in the scans, with no visible cracks, major tears, substantial losses, or strong staining.
- Provenance
- Imprint-supported production and distribution: Charles A. Zimmerman, photographer, Third Street, St. Paul, Minnesota; reverse advertisement for Merrill’s Collection of Minnesota Views, with D. D. Merrill, Randall & Co., 166 Third Street, St. Paul, named as trade supplier. No ownership history is established.
- Catalogue no.
- MSV1775
Catalogue details
Location
Saint Paul — probable convention location · Saint Paul, Minnesota, United States
Photographed subject · Locality (town) · 40% confidence
Williams’s history places the Minnesota State Sabbath School Convention in a temporary building opposite the Capitol in Saint Paul on July 5, 1871. This supports Saint Paul as the probable depicted city, but does not explicitly identify the photographed “Christian Workers” building or establish its exact site.








