Windowpane

The image is a black and white photograph. The title is "Windowpane" by artist [unknown]. The image features two rows of rectangular pieces of transparent material. The top row contains three pieces; the bottom row contains three pieces. The material appears to be textured. On each piece, a circular smudge pattern is visible, with a dark center. The smudge fades to lighter shades of gray towards the edges. Each piece appears to be labeled with small text at the bottom. The background appears to be a white surface with a label in the bottom-right corner that reads "THE METROPOLITAN MUSEUM OF ART".