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 CHAPTER II

OUR KNOWLEDGE OF EXTERNAL OBJECTS IS ONLY SENSATIONS

late years numerous studies have been published on the conception of matter, especially by physicists, chemists, and mathematicians. Among these recent contributions to science I will quote the articles of Duhem on the Evolution of Mechanics published in 1903 in the Revue générale des Sciences, and other articles by the same author, in 1904, in the Revue de Philosophie. Duhem’s views have attracted much attention, and have dealt a serious blow at the whole theory of the mechanics of matter. Let me also quote that excellent work of Dastre, La Vie et la Mort, wherein the author makes so interesting an application to biology of the new theories on energetics; the discussion between Ostwald and Brillouin on matter, in which two rival conceptions find themselves engaged in a veritable hand-to-hand struggle (Revue générale des Sciences, Nov. and Dec. 1895); the curious work of Dantec on les Lois Naturelles, in which the author ingeniously points out the different