The image is a black and white illustration of a quadrant, which is a type of astronomical instrument used by astronomers to measure the angle of the sun. The quadrant is shown in the center of the image, with the sun at the top and the moon at the bottom. 

On the left side of the illustration, there is a diagram of the quadrant with arrows pointing in different directions. The arrows are labeled A, B, C, D, E, F, G, H, and J, indicating the direction of the light. On the right side, there are two figures, one of which is holding the arrow and the other is pointing towards the sun, representing the sun's rays.

The illustration is accompanied by Chinese text that translates to "The Figure of the Quadrant" in English. The text is written in both English and Chinese characters.