The Erythemata , which vary in type from the rashes simulating those of some of the acute specific fevers to macular, papular, nodular, and bullous eruptions, haemorrhagic or not, are probably all of toxic origin. Many are certainly so, e.g. the serum and antitoxic rashes, the drug rashes, the pre-eruptive and secondary rashes of the acute specific fevers, the erythemata of rheumatic fever, the so-called "surgical scarlet fever" and septicaemic eruptions, and the eruption in late Bright's disease. Sometimes there is only one passing attack, but it may be febrile and severe, and demands an appropriate diet. At other times the outbreaks are recurrent at irregular intervals for years, as in erythema (herpes) iris and the remarkable recurrent scarlati-niform desquamative erythema. Obscure as the etiology of many of these cases is, it is important to carefully investigate the state and functioning of the gastro-intestinal tract, and to pay especial attention to the diet with a view to discover some error or idiosyncrasy, and so put a stop to the recurrent attacks.