A Contribution to the Psychology of Logic: Considered From a Physiological Standpoint

Excerpt from A Contribution to the Psychology of Logic Something is perceived in comparison with nothing  when it is a 'minimum percoptio/e' thing  or with something else, and the resultant of the ratio in consciousness is a sensation. The highest forms of sensation are equally reducible to a ratio between two terms, each of which may, however, be a highly compound ratio.  From Waller fin Introduction to Human Pnyrio/ogy, 3rd edition, I 896, p. 5 54.