=Coryza.=--Some cases respond instantly, others persist and run their usual course. Chronic nasal catarrh recovers in favorable climates, and in unfavorable tends to become permanent, though less severe and annoying under adjustment. =Croup.=--Always dangerous, but no fatalities reported under adjustments, which are powerfully effective. Croup requires constant attention until all symptoms subside, usually within an hour or two. =Cystitis.=--Usually curable, but some chronic cases prove intractable for an unknown reason. There is no way of recognizing the curability of a case before the attempt. =Deafness.=--Variable outlook. Deafness due to catarrhal occlusion of the Eustachian tubes is usually curable. That due to middle ear disease sometimes yields. That due to nerve disease is possibly--though not certainly--incurable. =Diabetes Insipidus.=--Prognosis excellent. Few cases fail of cure, and no fatalities are reported. =Diabetes Mellitus.=--Always necessitating grave and careful consideration, this metabolic disease is marvellously controlled by Chiropractic adjustment. Probably 90 per cent of all cases are curable, and only those presenting impossible problems of adjustment, or those in the very last stages, are hopeless. =Diarrhoea.=--Prognosis depends largely upon secondary causes. Adjustments sometimes produce diarrhoea to cleanse the intestinal tract of waste or poisons. Such a diarrhoea, if instituted by Nature without aid, does not cease with adjustments until its purpose is accomplished. Nervous and infective diarrhoeas usually respond well. =Dilatation of Heart.=--Compensatory hypertrophy and strengthening of the muscle usually follows adjustment. =Diphtheria.=--Under adjustment the false membrane tends to exfoliate and to be coughed out entire within a few hours, with rapid recovery. In children, watch for possible strangulation from loosened membrane. Constant bedside attention is imperative until fever and membrane have disappeared. Convalescence, unless antitoxin has been used, is very rapid, and physicians watching the clinical course of diphtheria under adjustment customarily doubt the diagnosis unless culture is made. Antitoxin modifies the prognosis toward gravity, and in spite of adjustments persistent sequelae often follow its use. =Dropsy.=--Cardiac or renal dropsy disappears with improvement in the diseased organ. =Dysentery.=--In temperate climates death is extremely unlikely. Recovery is often quick and easy, but some cases persist. The tropical amoebic dysentery seems hardest to master and may not improve at all. =Dyspepsia.=--Prognosis good. =Endocarditis.=--If primary, recovery is the rule. Occurring in the course of some other disease, as rheumatic fever, it renders the prognosis less certain and may terminate fatally. Likely to leave chronic valve weakness or contraction. =Enteritis.=--Prognosis generally fair. No figures available.