1. Tickets of admission shall be granted for periods of from three to any greater number of days. Some tickets being for the first three days of each week, or otherwise, as may be convenient. 2. They shall either be gratuitous or obtainable by a small payment. 3. Each ticket-holder shall wear the ticket by a string from the button of his coat, or as may be arranged. 4. He shall, when required by the police or attendants, assist in any duty they may desire for the safety or general convenience of the expositors. 5. Whenever he observes any irregularity, or has reason to believe that thieves or improper persons have obtained admission, he is to inform the nearest policeman. 6. Whenever he observes any machine or any object exhibited, to be out of order, or in danger of being injured, or its parts misplaced, he is to communicate the fact to the nearest attendant, who will refer him to the proper superintendent of that department. He will explain the defect he has pointed out, and if asked by the superintendent, he is to put it in order, or suggest to him some other person then present, who may be better able to complete the reparation. 7. Each master should be required to pledge his word that he will only recommend trustworthy persons. Each workman admitted might simply be required to give his word of honour that he would assist. These regulations ought to be printed and stuck up in various parts of the building. It would, indeed, be desirable to have a certain number of boards placed in the most public parts of the Exposition, on which should be fixed and properly classified all rules, and other information useful to the public. Also notices as to prices and hours of visiting the Exposition might from time to time be affixed. Each board ought also to have a plan of the ground-floor and galleries of the building, on which the names of the different subjects and countries occupying the various parts, might be readily ascertained by the visitors. [10] Several valuable papers containing rules of this kind have lately appeared in the _Lancet_. [11] The ancient law of rendering the hundred responsible for damages done by a mob, is founded on this principle. It is so important, that the reader will, perhaps, pardon another illustration. Amongst boys as amongst men, a degree of pugnacity exists, to the annoyance of the more quiet portion. This was checked at a certain school by giving full permission to the boys to fight whenever they liked, and at the same time prescribing certain simple rules for the combat, as follows:— 1. When two boys wish to fight, they must inform the chief usher of their wish. 2. He must appoint a time for the combat, not sooner than three, nor more than six hours, after the notice.