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 unions in the United States law. The federal Defense of Marriage Act in 1996, prompted by fears of an adverse result in Hawaii's lawsuit "Baehr v. Miike", defined a marriage explicitly as a union of one man and one woman for the purposes of all federal laws (See ), which was ultimately ruled unconstitutional by the Supreme Court in "United States v. Windsor" on June 26, 2013. As a result, shortly after "Windsor" was decided, a number of federal areas ranging from veteran benefits to immigration were clarified as applying equally to same-sex couples. The movement to obtain civil marriage rights and benefits for same-sex