Rare depiction of the moon's surface, as described by the German astronomer and naturalist Tobias Mayer.
The image shows the results of Mayer's careful description of the moon. He both investigated the surface features of the moon as well as developed a more precise table of locations for the moon, which helped further solve the longitude problem. In recompense, Mayer's widow was granted £3,000 (around half a million pounds today) by the British Government. His son, Johann Tobias Mayer, was an important physicist.
This work was published following Mayer's death in Gelpke's Allgemeinfaßliche Betrachtung über das Weltgebäude. . .