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The AIR article of the Encyclopedia hardly ignores recent chemical considerations on the air, though quite remarkable: the integral parts of the air are completely devoid of elasticity and are subject to the laws of chemical affinities such as those of any other substance. According to Venel's CHYMIE article, air must be understood in two ways by the philosopher of nature: as a constituent part of the bodies with chemical properties and as a mass with physical properties, or as fixed and expanding. In fact, this dual approach to air covers Venel's proposed distinction between chemistry and (ordinary) physics in terms of the size of their objects, but should also serve to highlight both the particularity and great relevance of the former's approach, which can also 'lend to engineering'. The issue of the nature of the air, which is common to both disciplines, provides an illustration of how chemistry can correct the 'mistakes' which, according to Venel, have decomposed physics. Turgot's EXPANSIBILITE article may thus be perceived as a rewriting of AIR, depending on the contributions of chemistry; any body is indeed a powerful air. ; International audience The Encyclopédie article Air is almost silent on the recent remarkable chemical thinking on air, whose component parts were said to be totally without elasticity and subject to the laws of chemical affinity like those of any other substance. Thus, as Venel insisted in his article Chymie, the air must be considered in two ways by natural philosophers: either as a constituent part of bodies possessing chemical properties and as a mass with physical properties, or as fixed and expanding. This dual approach to the air corresponds to the distinction made by Venel between chemistry and (ordinary) physics as to the size of their objects of study, but is also intended to emphasize both the specificity and the relevance of chemical method which can also 'lead to genius'. Thus the question of the nature of the air, common to the two disciplines, illustrated how chemistry ...

The Encyclopaedia opens with a biased presentation of chemistry, which is totally undervalued compared with old chemistry (alchemistry) which is used as an extraordinary chemistry to which we must tender. A change of staff is an opportunity to reassess the chemistry discourse, but also to highlight the autonomy of the field and to assert the vast area defined by the great variety of its objects, which is reflected in the typography of the large number of forms used to designate the region of knowledge to which the subject of articles closely or far related to chemistry relates. This strong presence of autonomous chemical knowledge, presented as a 'trunk', in the physical sciences and the arts implicitly leads to a new organisation of the knowledge tree. ; International audience The Encyclopédie opens with a biased presentation of chemistry, which is completely devalued compared to earlier chemistry (alchemy), seen as an extraordinary chemistry to be aimed at. The renewal of contributors provided the opportunity to reevaluate it and also to demonstrate the field's autonomy and insist on its vast territory defined by the great variety of objects of study. This is expressed in the typography of a large number of forms used to designate the region of knowledge to which the subject of articles more or less linked to chemistry belong. This strong presence of autonomous chemical knowledge, presented as a 'trunk' in physical science and the arts implicitly leads to a new organisation of the tree of knowledge. ; The Encyclopaedia opens with a biased presentation of chemistry, which is totally undervalued compared with old chemistry (alchemistry) which is used as an extraordinary chemistry to which we must tender. A change of staff is an opportunity to reassess the chemistry discourse, but also to highlight the autonomy of the field and to assert the vast area defined by the great variety of its objects, which is reflected in the typography of the large number of forms used to designate the region of knowledge to which ...