C. Judson Herrick, in his Introduction to Neurology, 2nd edition, 1918, gives a fuller and yet not too detailed account of the neurone in Chapter III, and of reflex action in Chapter IV.

Percy G. Stiles, in his Nervous System and Its Conservation, 1915, discusses these matters in Chapters II, III and IV.

Ladd and Woodworth's Elements of Physiological Psychology, 1911, has chapters on these topics.{45}

CHAPTER III
REACTIONS OF DIFFERENT LEVELS