1743.
Mayer hopes for professional opportunities in Augsburg, at that time known for instrument making and publishing. About his 3-year stay there is little known. Mayer presumably works for a cartographic publishing house and makes drawings for copper engravings. He meets the instrument maker Georg F. Brander, who is famous for mathematical and optical devices. Mayer probably helps him develop a micrometer. Inspired by this, he later developed his own device: a micrometer for exact lunar observation.
1745.
In his last year, he works at Pfeffelschen Verlag, which publishes successfully Mayer’s Mathematical Atlas. Mayer’s equally extensive book on fortification appears.
2 plates of the book on fortification and the art of war, consisting of a total of 74 engravings. Tobias Mayer, published by Martin Engelbrecht, 1745.
Background-Information.
Tobias Mayer went to Augsburg, where his father had lived during his apprenticeship. He hoped to find in this engraving and instrumentation well-known city a demanding job. But above all, should have played a role in the meantime his half-brother Georg Wilhelm worked there as a copper engraver. Tobias Mayer probably worked in the Pfeffel publishing house, which successfully published his Mathematical Atlas.