The image is a hand-colored engraving, titled 'TAB. XXI.' It depicts two scenes related to a camera obscura. **Fig. 1 (Top):** A person's head and arm are visible, leaning over a rectangular wooden box. The person is wearing a dark hat and appears to be tracing an image projected onto a piece of paper inside the box. A brass telescope-like lens is attached to the side of the box. The scene is set against a backdrop of pale green drapery with white highlights and a patterned wallpaper. The box sits on a dark wooden table. **Fig. 2 (Bottom):** A hand is shown holding a white piece of paper over the opening of the wooden box. The box is similar to the one in Fig. 1, with the brass lens attached. The hand is positioned to capture the image projected from the lens onto the paper. The background is the same pale green drapery and patterned wallpaper as in Fig. 1. The box sits on a dark wooden table. The style of the engraving is detailed and illustrative, typical of scientific or technical illustrations from the 18th or 19th century. The bottom of the image has the inscription 'J.W. Baillie, sculp. & excud. North.'