In the last decade a considerable number of papers have been written describing fatal illnesses in which the salient clinical features were asthma, eosinophilia, and heart failure. Weir (1939), Harkavy (1941), Chafee, Ross, and Gunn (1942), Miller and Daley (1946), Bergstrand (1946), Smith (1948), and Lennox (1948) have all reported such cases, the clinical course of which differed little from ...