DISEASES OF SWIXE AND OTHER ANIMALS. 



75 



APPENDIX. 



RECORD OF Dk. Law's ExrERiMEXxs.— No. 1. 



Male white J)} g, cifjld months old; noi^pccial hrecd. Formerhj fed offal from a ulamjhter-house. 



Was found eprs.vling: upon its belly iinaWe to stand; breathing slo-^-, deep, pant- 

 ing, and labored ; snout bot, dry, and of a leaden color ; ears and feet warm, Ijluisb, 

 but -tt-itbout any rasb, eruption,' blotches, or extravasations. Blood appears at the 

 arms. Aia hoiu- later this pig died. 



Fost-mortcm examination ihirti/six hours after death. — Bodi/ in excellent preservation; 

 condition low ; skin scurfy along the back ; snout livid blue, but without petechite. 



Digestive organs: Tongue has papillie, at its base reddened ; a similar blush appears 

 on the fauces and pharynx. 



Stomach and loicels normal. 



Liver firm and sound. Kidneys and bladder sound. 



Urethra (intrapelvic) deeply congcsteci, almost black, but without any obstruction. 



Parasites in abdomen: A few tricoccjyhali {tchijxvorms) in the large intestines; a hydatid 

 in the j)elvie fascia. 



Chest: Pleura normal; ^j(?r(car<?((/j?i healthy, with a small quantity of serum. 



Pight heart: Auricle and ventricle filled with dark clotted blood. 



Left heart : Auricle contains a small clot of black blood ; ventricle empty. 



Lungs : A great i^art of these is in a condition of carnification or infarction. This is 

 confined to definite lobules or groups of lobules, the collap.sed, red, fleshy aspect of 

 which is in marked contrast with the full form and pale pinkish-white color of the 

 remainder. 



The air passages (bronchi and bronchia) contain small portions of the contents of the 

 stomach which have been vomited up and drawn into the lungs in the last violent 

 efforts to breathe. The air-passages leading to the collapsed lobules contain large 

 quantities of a, watery mucas and pellets of worms {strongglus clongatns) which com- 

 j)letely block them. The obstructed terminal bronchia are dilated, and have their 

 mucous membrane variously reddened and congested. Around these bronchia the 

 connective tissue is strongly congested and filled with extravasatod lymph, by which 

 the vessels passing to and li'om the lobuletts are compressed and obstriTcted. In view 

 of this state of things, the explanation of the process of iutarction in the lobules is 

 ea.sy ; the irritation and congestion caused by the worms in the infei^tetl air-tubes ex- 

 tended to the surrounding connective tissue and the sheaths of the accompanying 

 blood- ve.s.sels ; the exudation of lymph compressed and obstructed the vessels, inducing 

 stagnation, congestion, and exudation in the whole substance of the lobule or lobuletts 

 to which these led. Hence the invariable connection of the infarcted lobule, and the 

 blocked, congested, and worm -infested tube that led to it. 



