De la propagation du son
On the propagation of sound
Euler analyzes the forces that act on a slice of air that is in a disturbed state at y but was initially at x. This analysis is customary in modern elementary works. (Based on Clifford Truesdell's introduction to Opera Omnia Series II, Volume 12.)
Original Source Citation
Mémoires de l'académie des sciences de Berlin, Volume 15, pp. 185-209.
Opera Omnia Citation
Series 3, Volume 1, pp.428-451.