[201] Op. cit., p. 85.
[202] Ibid.
[203] Decennial Publications of the University of Chicago, First Series, Vol. III, pp. 115-139.
[204] Ibid., p. 115.
[205] Ibid., p. 116.
[206] Op. cit., p. 120.
[207] Ibid., p. 121.
[208] Ibid., p. 122.
[209] Op. cit.
[210] Logic, second ed., Vol. I, p. 232.