The Système figuré of the sciences in the Encyclopédie and Wilhelm Ostwald's pyramid of the sciences, which was inspired by the ideas of Auguste Comte.
Top: Jean le Rond d'Alembert (1717–1783) and Denis Diderot (1713–1784), Système figuré, figure from the Encyclopédie, 1751; source: Wikimedia Commons, http://en.wikipedia.org/wiki/File:ENC_SYSTEME_FIGURE.jpeg, public domain.
Bottom: Wilhelm Ostwald (1853–1932), The pyramid of the sciences, inspired by Auguste Comte (1798–1857), 1912; source: Ostwald, Wilhelm: Der Bau der Wissenschaften, in: idem, Monistische Sonntagspredigten, second series [42nd sermon], Leipzig 1912, p. 346.