specific and Contagious Diseases. 169 



the digestion was disturbed ; fluctuating tubercular 

 tumours were discovered in the abdomen, and on testing 

 the lungs the sibilant rale was distinctly heard. There 

 was no cough, and still the chest was elastic and without 

 dulness on percussion. An injection of tuberculin was 

 made at i p.m. At 11.30 p.m. the temperature had fallen 

 to 99° F., and at 12.30 a.m. it was 98° F. Shortly after- 

 wards the animal died. xVn examination revealed the 

 presence of tubercular nodules in the lungs, varying in 

 size from a pin's head to larger areas, but they were firm, 

 thus accounting for the absence of rales. Bacilli were 

 found in the mucus of the bronchial tubes, and the 

 tubercular areas consisted mainly of epithelioid and 

 spindle-shaped cells. A few bacilli were also found. 

 The stage of caseation does not appear to have com- 

 menced. Miliary tubercles studded the mentum, liver, 

 and spleen. The mesenteric glands were enlarged, 

 hard, and fibrous, and in one a large abscess existed. A 

 few bacilli were also found. The absence of caseation, 

 or cheesy degeneration, so common in this disease, is 

 fully accounted for by the action which resulted in the 

 free development of fibrous tissue around the diseased 

 points. The Professor concludes with a suggestion as 

 to the value of tuberculin as a diagnostic in this disease 

 of the dog. 



Variola or Small pox in canine animals closely re- 

 sembles the form usually observed in mankind as well as 

 the sheep ; one of the means of its introduction being 

 the consumption of the flesh of sheep dying of the 

 disease. It appears in the usual forms of mildness or 

 malignancy ; it may be discrete or separate, confluent or 

 running together, and in further stages are those of 

 erythema, nodule, vesicle or bladder, and pustule, the 

 latter assuming the flat or concave surface from the usual 

 internal changes. Subsequently desquamation proceeds, 

 leaving hairless spots, which are hollow or concave scars 

 or " pits." The thin skin of the belly and insides of the 

 fore-arms or thighs are especially invaded. 



The Symptoms, in addition to those already enumerated, 

 consist of febrile disturbance from the first, which 



