The image shows a plate with four black and white photographs arranged in a 2x2 grid. The photographs appear to document the construction of geometric structures outdoors, likely in a field or wooded area. **Photo 1 (Top Left):** Shows a series of rectangular and triangular structures made of what appears to be wooden or metal frames, standing in a line. The background is a dense forest. **Photo 2 (Top Right):** Depicts a partially constructed geometric structure, possibly a dome or polyhedron, with a wireframe construction. The background shows a grassy field and distant trees. **Photo 3 (Bottom Left):** Shows a low-angle view of a partially constructed structure, possibly a wall or foundation, with some writing or markings on it. **Photo 4 (Bottom Right):** Features a more complete geometric structure, resembling a truncated octahedron or similar polyhedron, with a wireframe construction. It is partially obscured by tree branches. Each photograph has handwritten text at the bottom, likely dates or notes related to the construction. The overall tone of the image is historical and documentary, suggesting a scientific or artistic project from the early 20th century. Below the photographs is the text 'PLATE XVI'.