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La Lettre
instruction, approved on 25 October 1795, the thermidorian Convention created an "Institut des Sciences
et des Arts", aimed at “
perfecting sciences and arts by unremitting research, the publication of discoveries,
correspondence with scientific and foreign societies.
” One may feel here the remains of a faint grudge
against the period when work stopped at the Academy, and it may be noted there is an international
dimension in this Institute consisting of 144 members, divided into three classes, the first being physical
and mathematical sciences. This class became the "Académie des Sciences" by the Royal Ordinance of