1667. Moreover, spirits of the planet Jupiter said that the part devoted to understanding into which they operated is at the right side of the brain, a little above the temple, where I at the time, for some hidden reason, applied my hand. They said that the right lobe of the brain is therefore devoted to matters of thinking, and the left one to the feelings. The reverse is true in the body, for the left eye is devoted to matters of understanding and the right one to the feelings. 1748, 23 March.