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laries are well filled with blood. Lungs: Section from the right 

 lower lobe show a great engorgement of the interalveolar capillaries ; 

 in fact, all the blood vessels are highly congested. The alveoli 

 present a varying picture ; some of them are open, having contained 

 air only, and others are filled with extravasated blood, which does 

 not show any degenerative changes. Desquamated alveolar epi- 

 thelia, containing hematoidin granules, are seen occasionally. The 

 imchanged character of the blood, the small amount of pigment- 

 containing alveolar epithelia, and the absence of areas of coagula- 

 tion necrosis, show that the blood extravasation must be of com- 

 paratively recent in date. Quite a few of the air spaces are filled 

 with homogeneous coagulated material, which stains deeply with 

 eosin. Other alveoli contain a lighter staining material. Neither 

 the homogeneous nor the granular material takes Weigert's fibrin 

 stain, nor do the capillaries contain any hyaline (fibrin) thrombi. 

 Here and there is found a small solid nodule, hardly greater in 

 size than the larger alveoli themselves. These nodules are com- 

 posed of epithelioid and lymphoid cells and a considerable number 

 of eosinophilic polynuclears. Multinuclear giant cells are likewise 

 found in or near the center of some of the nodules. In fact, the 

 latter are absolutely identical in their make-up with the tubercles 

 which may be seen in sectioiis of the hepatic tissue. Both in the 

 pulmonary and in the hepatic tissue neighboring nodules are found, 

 the peripheries of which are in contact with each other. However, 

 the individual nodules have not become confluent and their out- 

 lines are well preserved. It is impossible to demonstrate tubercle 

 bacilli in these nodules, but they show a small number of the 

 bacilli of plague, found scattered between the cells. In properly 

 stained sections it is seen that some of the alveoli contain enormous 

 numbers of plague bacilli, such air spaces appearing almost filled 

 with them. Small groups of scattered plague organisms can be 

 found throughout the sections. Inguinal lymph nodes : The ingui- 

 nal lymph nodes show numerous large, dilated vessels, replete with 

 blood corpuscles. Around the larger vessels, particularly of the 

 hilus vessels, there is a powerful development of the connective 

 tissue. The general fibrillar connective tissue reticuhun is every- 

 where much increased. The peripheral follicles generally show a 

 well differentiated proliferation center. The peripheral lymph 

 sinus and its branches are dilated. Eosinophilic polynuclears are 

 found throughout the tissues, though nowhere in such large numbers 



