_What NOT to do_.--Do not apply leeches. Do not give either emetic tartar or antimonial wine, which is emetic tartar dissolved in wine. Do not administer either paregoric or syrup of poppies, either of which would stop the cough, and would thus prevent the expulsion of the phlegm. Any fool can stop a cough, but it requires a wise man to rectify the mischief. A cough is an effort of Nature to bring up the phlegm, which would otherwise accumulate, and in the end cause death. Again, therefore, let me urge upon you the immense importance of _not_ stopping the cough of a child. The Ipecacuanha Wine will, by loosening the phlegm, loosen the cough, which is the only right way to get rid of a cough. Let what I have now said be impressed deeply upon your memory, as thousands of children in England are annually destroyed by having their coughs stopped. Avoid, until the bronchitis be relieved, giving him broths, and meat, and stimulants of all kinds. For further observations on _what NOT to do_ in bronchitis, I beg to refer you to a previous Conversation we had on _what NOT to do_ in inflammation of the lungs. That which is injurious in the one case is equally so in the other. 208. _What are the symptoms of Diphtheria, or, as it is sometimes called, Boulogne Sore-throat_? This terrible disease, although by many considered to be a new complaint, is, in point of fact, of very ancient origin. Homer, and Hippocrates, the Father of Physic, have both described it. Diphtheria first appeared in England in the beginning of the year 1857, since which time it has never totally left our shores.