36 DISEASES OF SWINE AND OTHER ANIMALS. 



Pig No. 2 died at 6 o'clock, p. m. (See account of pig No. 1.) 



Post-mortem examination. — Skin normal; lungs partially bepatized; 

 liepatizatiou most marked in anterior lobes ; small quantity of serum in 

 pericardium ; liver enlarged ; one nematoid in choledochus ; abdominal 

 cavity free from seriun; eccbj'moses on the external surface of colon 

 and caecum ; capillary byperajmia and swelling in caical mucous mem- 

 brane; several small ulcerous tiunors in caecum, especially near the ilio- 

 caecal valve ; swelling, capillary congestion, and extravasations of blood 

 in mucous membrane of colon and ilium; kidneys normal; bladder 

 empty ; mucous membrane of stomach similar in appearance to that of 

 caecum, colon, and ilium. 



Account of pigs J^'os. 5 and G. — Pigs Nos. 5 and G, ^hich arrived, as 

 has been stated before, Augtist 22, at 1 o'clock, p. m., were i)ut in pen 

 No. 3, and at 1.30 o'clock, ]). in., the colon, the heart, and a x)iece of the 

 diseased lungs of pig No. 4 were given to them. They, however, 

 touched neither colon, heart, nor piece of lung. 



August 23. — Both pigs, Nos. 5 and G, in good health, and eat their 

 food greedily, but have not touched the colon, heart, and piece of lung. 

 The colon, having become very i^titrid, had to be removed ; heart and 

 piece of lung were thrown into the feed-trough. 



August 24. — Both pigs healthy. Heart and piece of lung have dis- 

 appeared, but whether they have been consumed by the i^igs or by rats 

 I am not able to decide. 



August 25. — Both pigs healthy ; have good api)etite, and eat greedily. 



August 2G. — The same. 



August 27. — The same. 



August 28. — The same. August 28th was a very hot day, but a severe 

 thunder-storm in the afternoon effected a sudden cooling of the atmos- 

 phere. 



August 20. — Both pigs, Nos. 5 and G, seem to have a slight catarrh, 

 probably in consequence of the sudden reduction of temperature and 

 change of weather. Both cough some. 



August 30. — Both pigs, to all appearances, all right, excei^t that occa- 

 sionally a slight cough can be heard. Both have tirst-rate appetites. 



August 31. — Both pigs apparently in perfect health ; appetite good. 



September 1. — Both pigs all right. 



Septemher 2. — The same. 



Septcmljer 3. — The same. Pig No. 5 coughed once or twice, but has 

 excellent appetite. 



Septemher 4. — Pig No. 5 coughs again a few times, but is lively, and 

 has very good appetite. No. G is all right in every respect. 



Septemler 5. — Both pigs all right. 



Scptem'ber G. — Both pigs have good appetite, are very lively, and seem 

 to enjoy good health. At 10.30 o'clock, a. m., the entire stomach, cut up 

 into hve i)ieces, the cajcum, and the spleen of pig No. 3 were given to 

 them, and consumed immediately in the presence of Dr. Prentice. 



Scptcmljcr 7. — Both pigs, Nos. 5 and G, have very good appetite. No. 

 5 has a slight cough, and a slight acctimulation of mucus in the inner 

 canthi of the eyes. (For furthei' particulars see the accounts given of 

 pigs Nos. 5 and G in the chapter on Symptoms and Morbid Changes.) 



Having thus ascertained by experiments, jtist related, that swine- 

 plague is infectious, and can be commtmicated by inoculation, and also 

 through the digestive canal by a consumption of morbid tissues, I con- 

 sidered it to be of great importance to ascertain, if possible, the nature 

 of the infectious principle ; that is, to decide by experiments whether it 

 consists in somctliiiig corporeal, endowed with life and i)ower of ijropa- 



