Editorial note — Page 67 CHAPTER IV

[Footnote 1: The reader must be reminded that the simpler reflexes involved in the use of the heart, lungs, intestines, and all the internal organs, must be classed as part of man's native equipment. They differ from those reactions commonly classed as instincts in that they are simpler and stabler, that in their normal functioning they never rise to consciousness, and that they are almost completely beyond the individual's modification or control.]