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The character of the material formed in the trachea and bronchi was not that usually seen in diphtheria of the respiratory tract, which gives a soft, dirty, greyish membrane. In this case, the material was granular, hard, dry, and gummy, somewhat similar to the cereal, grapenuts. The color varied from dark red to a dirty brown. The casts were cylindrical and solid. The length varied from small fragments up to 2.5 cm. for the bronchial casts, and 4.75 cm. for the trachéal casts. The diameter ofdoi:10.1056/nejm192111101851905 fatcat:lmji4apph5e5tnsn73hddrct44