Letter from Lord Rayleigh to Frederick Lanchester

Scope and Content

Regarding pressure and momentum of sound waves, referring to text of Lanchester’s book “Aerial Flight” (Vol. I.) “Aerodynamics”. [Lord Rayleigh (1842-1919), mathematician and physicist, was, among other honours, President of the Royal Society, 1905, and President of the Advisory Committee on Aeronautics, 1909].