E390 -- Considerationes de traiectoriis orthogonalibus (Considerations of Orthogonal trajectories)
According to the records, it was presented to the St. Petersburg Academy on August 18, 1768.
- Originally published in
Novi Commentarii academiae scientiarum Petropolitanae 14, 1770, pp. 104-128
- Opera Omnia: Series 1, Volume 28, pp. 99 - 119
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