The _Salons_ 45 Qualities of their criticism 45 Deep foundation of Diderot's critical quality 46 French art-criticism 48 Dufresnoy, Dubos, Webb, Andre, Batteux 48, 49 Travellers in Italy 50 Diderot never in Italy 52 Spirit of French art in his day 52 Greuze, Diderot's favourite 56 Greuze's _Accordee de Village_ 57 Hogarth would have displeased Diderot 59 Diderot's considerateness in criticism 60 Boucher 62 Fragonard 62 Diderot adds literary charm to scientific criticism 63 His readiness for moral asides 65 His suggestions of pictorial subjects 68 His improved versions 69 Illustration of his variety of approach 72 Diderot's Essay on Painting 73 Goethe's commentary 73 Difference of type between Goethe and Diderot 76 Diderot's Essay on Beauty 78 His anticipation of Lessing 82 Music 83 CHAPTER IV. ST. PETERSBURG AND THE HAGUE.