CONTAGIOUS DISEASES OF DOMESTICATED ANIMALS. 405 



lymphatic glands swelled ; adhesion, though not extensive, between left 

 lobe of lungs and diaphragm; both lobes externally very mottled in ap- 

 Iiearance, and diseased in about an equal degree, but the hepatized por- 

 tions and lobules alternating with almost healthy portions, and in the 

 latter numerous extravasations of blood presenting themselves as 

 small red spots.* 



Those parte and lobules not yet hepatized, or perfectly impassable to 

 air, contained considerable exudation still in a fluid condition, and some 

 of the smaller bronchiae, especially those in the posterior portions of the 

 lungs, harbored a very large number of very line thread-shaped worms 

 {Strongyli paradoxus). As other morbid changes, may be mentioned 

 several ounces of serum in the chest, and more than one ounce in the 

 pericardium. There was nothing very abnormal in the abdominal cavity. 

 The dead pig was an animal about seven months old, and in a fair con- 

 dition as to flesh. 



November 22. — The disease had developed a more malignant character. 

 Over two hundred animals were sick ; from forty to fifty were very bad, 

 and several deaths had occurred. Ordered once more a strict separa- 

 tion, which had become possible, since abundant rains had removed 

 the scarcity of water ; gave some carbolic acid, and some salycilic acid, 

 and some hyposulphite of soda, to be tried on different lots, with in- 

 structions how to use it. 



The continued rainy weather, the exceedingly bad conditions of the 

 roads, and the great distance of Mr. Morris's place ii-om Oquawka, 

 (about fifteen miles), prevented me from making another visit during 

 the month of November. I was, however, informed by letter, dated 

 December 1, that the separation had been carried out, the medicines 

 used according to directions, and that only a few animals had died, and 

 all those slightly aifected were recovering. I made afterwards, on De- 

 cember 18, another visit, and found the separation broken up again as 

 soon as an improvement became apparent. Still, comparatively few 

 animals, the exact number I was unable to learn, had died. Found one 

 dead animal when I was there. The post-mortem examination revealed 

 the usual morbid changes in the lungs, heart, pleura, pericardium, and 

 lymphatic system, but no morbid changes of any consequence in the 

 abdominal cavity, except enlarged glands and somewhat degenerated 

 pancreas. 



5. The herd of Mr. Ely Beaty, about four miles from Oquawka. This 

 herd consisted of about one hundred head of hogs and pigs, and was 

 visited for the first time on December 20. Found two pigs dead and 

 fiv^e very sick. The herd was divided into two portions, and had been 



• Tlie illustration, Plate II, presents the external surface of the left lobe, photo- 

 graphed from nature, but a little reduced in size, and somewhat distorted in shape on 

 account of its weight while suspended before the camera. The central portion of the 

 plate is a good representation, and shows the mottled appearance of the lobe, but the 

 left and u])per portion of the plate are poor, and were evidently not in focus. The 

 microphotoKra])h8, Plate III, figs. 1 to 6, were taken from slides of transversal sections 

 of pulnional tissue of the right lobe of the same lungs. Fig. 1, Plate III, taken from 

 a very thin section, shows nearly all the pulmonal vesicles perfectly closed ; fig. 2 

 shows diseased pleura and small blood extravasations ; fig. 3 is from a very thin sec- 

 tion, and shows diseased and thickened pleura. The normal pulmonal tissue is recog- 

 nizable, notwithstanding the pulmonal vesicles are more or less filled with exudation ; 

 fig. 4 shows extrava.sation of blood and hepatization, but the structure of the pul- 

 monal tissue can still be recognized ; fig. 5 shows in its upper portion a blood vessel 

 completely filled with blood ; and fig. 6, which was taken from a thicker section, not 

 stained, presents partially hepatized pulmonal tissue, in which the shape and form of 

 the pulmonal cells are yet visible. Figs. 1 to 5 were taken from sections stained with 

 Kleinenburg^H solution. 



