should be re-opened.  The consequence was, there was so great an accumulation around the doors outside, that it was almost impossible for the crowd to get out.  The whole difficulty arose from the eager desire of every one to remain as near as possible to the door, through which they were to come back again.  Notwithstanding the utmost efforts of the officers, fifteen minutes were sometimes consumed in effecting the object, when the order was given that the spectators should retire.

The whole difficulty was removed by a very simple plan.  One door only was opened when the crowd was to retire, and they were then admitted, when the gallery was opened again, through the other.  The consequence was, that as soon as the order was given to clear the galleries, every one fled as fast as possible through the open door around to the one which was closed, so as to be ready to enter first, when that, in its turn, should be opened.  This was usually in a few minutes, as the purpose for which the spectators were ordered to retire was in most cases simply to allow time for taking a vote.  Here it will be seen that, by the operation of a very simple plan, the very eagerness of the crowd to get back as soon as possible, which had been the sole cause of the difficulty, was turned to account most effectually to the removal of it.  Before, the first that went out were so eager to return, that they crowded around the door of egress in such a manner as to prevent others going out; but by this simple plan of ejecting them by one door and admitting them by another, that very eagerness made them clear the passage at once, and caused every one to hurry away into the lobby the moment the command was given.

The planner of this scheme must have taken great pleasure in witnessing its successful operation; though the officer who should go steadily on, endeavoring to remove the reluctant throng by dint of mere driving, might well have found his task unpleasant.  But the exercise of ingenuity in studying the nature of the difficulty with which a man has to contend, and bringing in some antagonist principle of human nature to remove it, or, if not an antagonist principle, a similar principle, operating, by a peculiar arrangement of circumstances, in an antagonist manner, is always pleasant.  From this source a large share of the enjoyment which men find in the active pursuits of life has its origin.

The teacher has the whole field which this subject opens fully before him.  He has human nature to deal with most directly.  His whole work is one of experimenting upon mind; and the mind which is before him to be the subject of his operation is exactly in the state to be most easily and pleasantly operated upon.  The reason now why some teachers find their work delightful, and some find it wearisomeness and tedium itself, is that some do and some do not take this view of the nature of it.  One instructor is like the engine-boy, turning, without cessation