As a rule, eczema requires for its removal both constitutional and external treatment. Certain cases, however, seem to be entirely local in their nature, and in these cases external treatment alone will have satisfactory results. #What general measures as to hygiene and diet are commonly advisable?# Fresh air, exercise, moderate indulgence in calisthenics, regular habits, a plain, nutritious diet; abstention from such articles of food as pork, salted meat, acid fruits, pastry, gravies, sauces, cheese, pickles, condiments, excessive coffee or tea drinking, etc. As a rule, also, beer, wine, and other stimulants are to be interdicted. #Upon what grounds is the line or plan of constitutional treatment to be based?# Upon indications in the individual case. A careful examination into the patient's general health will usually give the cue to the line of treatment to be adopted. #Mention the important remedies variously employed in the constitutional treatment.# _Tonics_--such as cod-liver oil, quinine, nux vomica, the vegetable bitters, iron, arsenic, malt, etc. _Alkalies_--sodium salicylate, potassium bicarbonate, liquor potassae, and lithium carbonate. _Alteratives_--calomel, colchicum, arsenic, and potassium iodide. _Diuretics_--potassium acetate, potassium citrate, and oil of copaiba. _Laxatives_--the various salines, aperient spring waters, castor oil, cascara sagrada, aloes and other vegetable cathartics. _Digestives_--pepsin, pancreatin, muriatic acid and the various bitter tonics. #Are there any remedies which have a specific influence?# No; although arsenic, in exceptional instances, seems to exert a special action. Cod-liver oil is also of great value in some cases. Upon the whole the most important remedies are those which keep in view the maintenance of a proper and healthful condition of the gastro-intestinal tract, and especially with regular and rather free action of the bowels. #In what class of cases does arsenic often prove of service?# In the sluggish, dry, erythematous, scaly and papular types. #In what cases is arsenic usually contraindicated?# It should never be employed in acute cases; nor in any instance (unless its action is watched), in which the degree of inflammatory action is marked, as an aggravation of the disease usually results. #What should be the character of the external treatment?# It depends mainly upon the degree of inflammatory action; but the stage of the disease, the extent involved, and the ability of the patient to carry out the details of treatment, also have a bearing upon the selection of the plan to be advised. #What is to be said about the use of soap and water in eczema?#