[10]G. Jäger. “Zur Theorie des Nachhalls.” Sitzungsberichte der Kaiserliche Akad. der Wissenschaften in Wien, Math-naturw. Klasse; Bd. CXX. Abt. 11 a. Mai, 1911.
[11]Science, Vol. 35, p. 833, 1912.
[12]Arch. Quarterly of Harvard University, March, 1912.
[13]Osborne Reynolds. Proc. of Royal Soc., Vol. XXII, p. 531, 1874.
[14]Joseph Henry, “Report of the Lighthouse Board of the United States for the year 1874.”
J. Tyndall, Phil. Trans., 1874.
[15]Sabine, Engineering Record, Vol. 61, p. 779, 1910. Watson, Engineering Record, Vol. 67, p. 265, 1913.
[16]Sabine and Watson. Ibid.
[17]La Nature (Paris), April 24, 1909.
[18]Rayleigh “Theory of Sound,” Vol. II, § 283.