He must _not_ be allowed to go out for at least a month from the commencement of the attack, in the summer, and six weeks in the winter; and not even then without the express permission of a medical man. It might be said that this is an unreasonable recommendation: but when it is considered that the whole of the skin generally desquamates, or peels off, and consequently leaves the surface of the body exposed to cold, which cold flies to the kidneys, producing a peculiar and serious disease in them, ending in dropsy, this warning will not be deemed unreasonable. Scarlet fever dropsy, which is really a _formidable disease, generally arises from the carelessness, the ignorance, and the thoughtlessness of parents in allowing a child to leave the house before the new skin is properly formed and hardened_. Prevention is always better than cure. Thus far with regard to the danger to the child himself. Now, if you please, let me show you the risk of contagion that you inflict upon families, in allowing your child to mix with others before a month at least has elapsed. Bear in mind, a case is quite as contagious, if not more so, while the skin is peeling off, as it was before. Thus, in ten days or a fortnight, there is as much risk of contagion as at the _beginning_ of the disease, and when the fever is at its height. At the conclusion of the month the old skin has generally all peeled off, and the new skin has taken its place; consequently there will then be less fear of contagion to others. But the contagion of scarlet fever is so subtle and so uncertain in its duration, that it is impossible to fix the exact time when it ceases. Let me most earnestly implore you to ponder well on the above important facts. If these remarks should be the means of saving only one child from death, or from broken health, my labor will not have been in vain. 222. _What means do you advise to purify a house from the contagion of Scarlet Fever?_