...combining volume of X was V, then consider only multiples of V as possibilities. In the water reaction, two volumes of hydrogen combine with one volume of oxygen to form two volumes of water vapor. Given the above rule, and knowledge of these combining volumes, the revised...

...oxygen were supplied to the combustion appatatus. It was easier to do this by volume than by weight. Two volumes of hydrogen combine with one volume of oxygen to form water. Knowing the conditions of temperature and pressure under which the gases were held then made it possible...

...unlike solids and liquids. Later he discovered that gases combine in simple volume ratios. For example, two volumes of hydrogen combine with one volume of oxygen to form water. This is now called Gay-Lussac's law. Ever curious, Gay-Lussac wanted to know whether the Earth's magnetic...

...established by Cavendish, namely, that, as nearly as possible, 2 volumes of hydrogen combine with 1 volume of oxygen to form water, the gases having been...same temperature and pressure. Humboldt suggested to Gay-Lussae that it would be well to investigate whether similar simple relations exist between the...

...boils at 159° C., may be used). The experiment is conducted as already described and it is found that two volumes of hydrogen combine with one volume of oxygen to form two volumes of water vapour at the same temperature, ie there has been a change in volume on combination...