DISEASES OF SWINE AND OTHEK ANI.MALS. 33 



siderable information as to the various featiu-es of tlie disease duiing 

 liie and after deatli, and as to the conditions and. surroundings under 

 wliicli the same makes its appearance. The first series of experiments 

 has been made for the purpose of settling the question as to the con- 

 tagiousness or non-contagiousness of Swine-Phigue. This was the more 

 necessary from the fact that those Avho had suffered severe losses "were 

 decidedly divided on that question. 



FIRST SERIES OF EXPERBIENTS. 



After encountering considerable difficulty in finding indubitably healthy 

 ])igs, belonging to a jierfectly healthy herd, which had never Ijeen in con- 

 tact with diseased animals, I succeeded finally, on the 20th of August, in 

 l)uying of Mr. Harris, south of Champaign, three Berksliiro sow pigs 

 about three and a half months okl, x>erfectly healthy, and without any 

 lesions whatever. I designated them as pigs ISTos. 1, 2, and o. Dr. 

 Prentice, at the same time, had the kindness of placing at my disposi- 

 tion two box-stalls in his veterinary hospital, a new building which had 

 never been entered by any hog or pig. About one hundred and fifty 

 yards east of the veterinary hospital building, on a piece of ground 

 never trodden by hogs, as far as known, I built of ]iew lumber a pen 

 eight feet square. • This pen I designated pen ^o. 1, and the box-stalls, 

 Avhich are twelve feet square, as pens Kos. 2 and '3 respectively. Pig 

 Xo. 1 was put in i^enXo. 1, and i)igs JSTos. 2 and 3 together in pen No. 2. 



It may be well to state here that pen JSTq. 1 having no iioor, but rest- 

 ing on the ground, was moved to another i^iace (each time its own width) 

 every other day, usually at noon, in order to preserve cleanliness, and. 

 pens Xos. 2 and 3 were cleaned and swept once a, day, except where 

 stated otherwise in the following pages. The food of all experimental 

 ])igs was the same, and consisted of corn in the ear, and occasionally a 

 little green clover and purslane at noon or in the evening. The water 

 for drinking was drawn three times a day from a well. 



1. Account of pig No. 1. — On August 21 I procured from Mr. Bassett, 

 four miles north of Chami^aign, a diseased Chester white i)ig, four months 

 old (pig iSTo. 4), which I put with pig ISTo. 1 in pen Ko. 1. This diseased 

 l)ig which arrived at 10.30 o'clock, a. m., exhibited plain and unmis- 

 takable symptoms of swine-plague; its temi)erature was lOGJo p.^ and 

 its skin, on lower surface of the body, between the legs, &c., was con- 

 siderably reddened. The temperature of pig No. 1, which objected 

 to being examijied and struggled hard, was lOi^"^ F. 



Avgmt 22. — Pig No. 1 all right; has vigorous" appetite. Pig No. 4 at 

 8 o'clock a. m. very sick ; has a peculiar, short, abrupt cough ; at 1 

 o'clock, p. m., dead. 



Post-mortem examination. — Capillary redness in the skin on lower sur- 

 face of body and between the legs; considerable enlargement of lym- 

 phatic; glands ; more than tAvo-thirds of the lungs hepatized and gorged 

 Avith blood-serum; some straAv-colored serum in thoracic cavity and 

 l)ericardium; and morbid growths in process of decay (ulcerous tumors), 

 in cuMuim and colon, 



lieceived at 1 o'clock, p. m., three more pigs, each about three months 

 old (cross of Berkshire and scrub), of Mr. Schumacher, a butcher in 

 Champaign, Avho had l)ought tlui same of a tarmer ten miles southeast 

 of Champaign. 1 designated the same as pigs Nos. 5, {>, and 7. Pigs 

 Nos. 5 and ai)peared to be perfectly healthy, and Avere ])ut together in 

 pen No. 3. Pig No. 7 Avas apparently indisposed ; it had been trans- 

 l)orted ten miles, croAAded together Avith twenty others, most of them 

 3 sw 



