Elements of pathological anatomy . on-jecture, which requires further proof before it can beadopted. In one hundred and twenty cases examined by Housse-not, the false membrane was limited to the larynx andtrachea in seventy-eight, while in forty-two, or one-third, it extended to thelarger bronchia. Fig. 117, from Hunter, represents a portion of plastic lymphexpelled from the lungs ; it has a ramiform appearance, and must have reachedinto the smaller bronchia, which, however, is infrequent. Varying in thickness, in different cases, the membrane seldom exceeds thethird or fourth of a line, thoug
Elements of pathological anatomy . on-jecture, which requires further proof before it can beadopted. In one hundred and twenty cases examined by Housse-not, the false membrane was limited to the larynx andtrachea in seventy-eight, while in forty-two, or one-third, it extended to thelarger bronchia. Fig. 117, from Hunter, represents a portion of plastic lymphexpelled from the lungs ; it has a ramiform appearance, and must have reachedinto the smaller bronchia, which, however, is infrequent. Varying in thickness, in different cases, the membrane seldom exceeds thethird or fourth of a line, though in some instances it is the eighth or tenth ofan inch. It is of a light greyish color, is composed chiefly of albumen andfibrin, and is generally much stronger, more tenacious, and more firmly adhe-rent in the larynx than in the trachea and bronchial tubes ; in the latter of whichit is often loose or even floating. The mucous coat beneath this lining isusually highly injected, inflamed, and unnaturally rough, from the projection. LARYNGITIS. 411 of its mucous follicles. In slight cases, the color is of a light red, and occursin patches, streaks, or points: in more severe ones,it is scarlet, brownish, or purple, and uniformlydiffused. To the presence of this plastic production, toge-ther with the tumefaction of the lining membraneof the trachea and bronchiae, wThich so often accom-panies the disease, is to be imputed, in great mea-sure, the impediment to the respiration in portions of it are detached, and, bysticking in the air-passages, cause suffocation. Inother instances, it is coughed up, either piece-meal,or in the form of a dense, inspissated cylinder, andthe patient recovers. The organization of thismembrane is admitted rather from analogy thanfrom any positive observation. The occurrence,if possible, must be extremely rare. Membranous croup, as already stated, is essen-tially a disease of early life. I have noticed itseveral times in children at the bre
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