. Transactions of the American Climatological and Clinical Fig. 5.—Diagram of sagittal section, one inch to left of medial plane of lungof adult negro, male, age about 30 years; cause of death, rupture of superiormesenteric vein, lung normal, except that largest lymph gland shows two caseousareas, indicated by lighter shading. Particular attention is called to the relationsof the bronchial arteries to the bronchi and lymph BV—Blood-vessels, pulmonary arteries and veins, cut obliquely. A—Bronchial arteries. Br—Bronchi. LG—Lymph glands. the same cadaver, I did not feel tha
. Transactions of the American Climatological and Clinical Fig. 5.—Diagram of sagittal section, one inch to left of medial plane of lungof adult negro, male, age about 30 years; cause of death, rupture of superiormesenteric vein, lung normal, except that largest lymph gland shows two caseousareas, indicated by lighter shading. Particular attention is called to the relationsof the bronchial arteries to the bronchi and lymph BV—Blood-vessels, pulmonary arteries and veins, cut obliquely. A—Bronchial arteries. Br—Bronchi. LG—Lymph glands. the same cadaver, I did not feel that I could despoil it to seekfor evidence as to the validity of my present hypothesis. Itis presented here simply to show the marked enlargement of. Face p. 344. ACUTE LOBAR PNEUMONIA AND ANATOMY OF THE LUNGS 345 the tracheal and mediastinal glands that prevails inpneumonia, and by inference the probability that thisenlargement was not without pressure effect upon thebronchial arterv of the right side. Since making these dissections it has not been my fortuneto be able to examine any other pneumonia cases, therefore,statistically, this hypothesis rests upon but one actual dis-section of a cadaver dead of pneumonia. However, thehypothesis, when applied to the accepted statistical failsrelative to the etiology of the disease, appears to satisfy themmore plausibly than any other explanation hitherto offered. Thus, in the marked increase of pneumonia withadvancing age, the fact is admitted that the glands of thelungs and the mediastinum progressively increase in sizefrom continuous absorption of dust and other foreign par-ticles, as also from a continued succession of pathogeneticconditions to which they are subject. Therefore, this i
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