I. We have given you a great variety of Demon-

strations or Feats, but you must not attempt to pro- duce all of them at an evening's entertainment. It will take some time to perform a few of them effect- ively, and impressively, and you should avoid any attempt to hurry through the feats. Nor should you spoil your good impression by cheapening the demonstrations in the direction of performing too many at one sitting.