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
Recognition of same-sex unions in Estonia of same-sex marriages or partnerships". On January 4, 2006, five Estonian NGOs supporting LGBT rights issued a press release asking for the Government to draft a new partnership law to give same-sex couples equal rights with opposite-sex couples. On the other hand, a number of conservative politicians claimed that Estonia was not yet ready for same-sex marriage, and that there was no need to create a separate law on same-sex unions since existing laws already implied the protection of some of these unions, despite not mentioning same-sex unions explicitly. Väino Linde, the chief of the Constitution Commission of the Riigikogu