In 1822 the French appointed commission to finding the speed of sound in air. Two hills near Paris chosen for the experiment at Villejuif and Montlhery. On each hill a gun was discharged. Observers on the other hill, by noting the time of flash and time at which they heard report, calculated the speed to be 1,118.152 feet (340.8m) per second. Gay-Lussac, Humboldt and Bouvard at Montlhery, Arago, Mathieu and Prony were at Villejuif. From Robert Brown Science for All, London, c.1880
credit: culture-images/ua
author: 93200
image ID: ci01387071.jpg
Need the usage rights for print data? You need more information about picture rights and licenses? Then please log in using the login form or contact our picture editors.
Phone: +49 221 430 71 93
office@culture-images.de