[31] Du principe de l'art et de sa destination sociale, Paris, 1875.
[32] M. Guyau, L'Art au point de vue sociologique, 1889 (3rd ed. Paris, 1895); Les Problèmes de l'esthétique contemporaine, Paris, 1884; cf. Fouillée, pref. to the former work, pp. xli-xliii.
[33] L'Art au point de vue sociologique, pref. p. xlvii.
[34] Op. cit., passim, esp. ch. 4; cf. pp. 64, 85, 380.
[35] Max Nordau, Social Function of Art, 2nd ed., Turin, 1897.
[36] Karl Bücher, Arbeit u. Rhythmus, 2nd ed., Leipzig, 1899.
[37] Custom and Myth, p. 276; quoted by Knight, The Philosophy of the Beautiful, vol. i. pp. 9-10.
[38] Lectures on the Science of Language, 1861 and 1864 (Fr. tr., Paris, 1867).
[39] William Dwight Whitney, The Life and Growth of Language, London, 1875 (It. tr., Milan, 1876).
[40] Hermann Paul, Principien der Sprachgeschichte, 1880 (2nd ed., Halle, 1886).