1154. Such spirits actually have charge over the urinary canal, and over the entire function of urination. That spirits are assigned to that duty, I was taught by an experience lasting several days, as well as by the effect of their withdrawing, when the emission of urine entirely stopped. And when these spirits tensed [the sphincter, 867], then they indignantly repeated the action, which seemed to me to be dangerous for the neck of the bladder. These workings were made so plain to me that there can be no doubt. Others cannot feel them, for reasons spoken of elsewhere [1145-45 1/2].