The image is a detailed, vintage illustration of a fan, likely a botanical or scientific diagram. It appears to be a cross-section of a fan, revealing its internal structure. The fan is depicted in a semi-circular shape, with numerous ribs radiating from the base. These ribs are densely packed and create a textured pattern. The surface of the fan is covered in a fine, stippled texture, suggesting a delicate material. Several letters are placed around the diagram, labeling different parts of the fan's structure. These letters include A, B, C, D, E, F, G, H, I, K, L, M, N, and O. The letters are positioned along the edges and within the fan's structure, indicating specific anatomical features. The background is a pale yellow, giving the illustration an aged appearance. The style of the illustration suggests it is from a historical botanical or scientific text.