Page "Amedeo Avogadro" Paragraph 17

The scientific community did not give great attention to his theory, so Avogadro's hypothesis was not immediately accepted.

André-Marie Ampère achieved the same results three years later by another method ( in his -- On the Determination of Proportions in which Bodies Combine According to the Number and the Respective Disposition of the Molecules by Which Their Integral Particles Are Made ), but the same indifference was shown to his theory as well.