On a telescope made from four lenses and its perfection
According to Jacobi, a treatise with approximately the same title was read to the Berlin Academy on November 12, 1761, and another (a continuation?) with exactly the title listed above was read on May 5, 1763. According to St. Petersburg Academy records, these treatises were presented to that Academy on May 17, 1762 and December 21, 1763.
Original Source Citation
Novi Commentarii academiae scientiarum Petropolitanae, Volume 12, pp. 224-271.
Opera Omnia Citation
Series 3, Volume 6, pp.351-396.