Physical dissertation on sound
Euler wrote this Habilitation thesis as part of his application to the Physics chair of the University of Basel in 1727 (it was customary to present a paper of one's research, to demonstrate that one might be of service to the institution). It was reprinted in 1751 in a collection of papers edited by Albrecht von Haller in Göttingen.
Euler first explains his theory of what makes up the atmosphere; the basis of his theory lies in the theory of elasticity of the teacher he had before Johann Bernoulli. He also states (without proof) a formula for the speed of propagation and derives from it numerical values of the correct order of magnitude for air.
Original Source Citation
Basel: E. and J. R. Thurnisiorum, Volume 1727, pp. 208-226.
Opera Omnia Citation
Series 3, Volume 1, pp.181-196.