Gas dioxide, and air expand to the same extent over the same 80 kelvin interval. He noted that, for an ideal gas at constant pressure, the volume is directly proportional to its temperature: In 1802, Joseph Louis Gay-Lussac published results of similar, though more extensive experiments. Gay-Lussac credited Charles' earlier work by naming the law in his honor. Gay-Lussac himself is credited with the law describing pressure, which he found in 1809. It states that the pressure exerted on a container's sides by an ideal gas is proportional to its temperature. In 1811, Amedeo Avogadro verified that equal volumes of pure
Same-sex marriage in the Republic of Ireland Affairs, Katherine Zappone, on 18 October and the law went into effect the following day. 91 same-sex marriages were performed between 16 November and 31 December 2015, 47 of them were between men and 44 were between women. A few days ahead of the anniversary of the Marriage Equality referendum on 22 May 2016, the Department of Social Protection released statistics on the number of same-sex marriages that had taken place since November 2015. A total of 412 same-sex marriages were performed in those six months. 1,082 same-sex couples wed in Ireland in the one year following the "Marriage Act"'s