Take of--Chlorate of Potash two drachms, Boiling Water seven ounces Syrup of Red Poppy one ounce To Make a mixture. A table spoonful to be taken every four hours. Or the chlorate of potash might be given in the form of powder-- Take of--Chlorate of Potash two scruples, Lump Sugar one drachm Mix and divide into eight powders. One to be put into a dry tea spoon and then placed on the tongue every three hours, These powders are very useful in diphtheria; they are very cleansing to the tongue and throat. If they produce much smarting as where the mouth is very sore they sometimes do, let the patient, after taking one, drink plentifully of milk, indeed I have known these powders induce a patient to take nourishment, in the form of milk, which he otherwise would not have done, and thus to have saved him from dying of starvation, which, before taking the powders, there was every probability of his doing. An extensive experience has demonstrated to me the great value of these powders in diphtheria, but they must be put on the tongue dry. As soon as the skin has lost its preternatural heat, beef tea and chicken broth ought to be given. Or if great prostration should supervene, in addition to the beef tea, port wine, a table spoonful every four hours, should be administered. If the child be cold, and there be great sinking of the vital powers, brandy and water should be substituted for the port wine. Remember, in ordinary cases, port wine and brandy are not necessary, _but in cases of extreme exhaustion_ they are most valuable. As soon as the great heat of the skin has abated and the debility has set in, one of the following mixtures will be found useful-- Take of--Wine of Iron, one ounce and a half, Sample Syrup, one ounce, Water, three ounces and a half To make a Mixture. A table spoonful to be taken every four hours. Or, Take of--Tincture of Perchloride of Iron, one drachm Simple Syrup, one ounce, Water, three ounces To make a Mixture. A table spoonful to be taken three times a day. If the disease should travel downwards, it will cause all the symptoms of croup, then it must be treated as croup, with this only difference, that a blister (_Tela Vesicatoria_) must _not_ be applied, or the blistered surface may be attacked by the membrane of diphtheria, which may either cause death or hasten that catastrophe. In every other respect treat the case as croup, by giving an emetic, a tea spoonful of Ipecacuanha Wine every five minutes, until free vomiting be excited, and then administer smaller doses of Ipecacuanha Wine every two or three hours, as I recommended when conversing with you on the treatment of croup.