64 THE DISEASES OF DOMESTIC ANIMALS. 



months the cow was killed. The emaciated condition had grad- 

 ually increased, the milk-secretion likewise decreasing : in the first 

 month the yield of milk decreased 600 grammes ; in the second, 500 

 grammes, and during the last eight days the secretion ceased en- 

 tirely, although the animal received all the nourishment she could 

 consume. 



'■'■Autopsy. — The inner thoracic walls, the diaphragm, and the 

 mediastinum were covered with numerous tubercles of variable di- 

 mensions ; the pulmonary pleura, or covering of the lungs, was far 

 less complicated. The lungs were voluminous, and double their 

 normal weight, l^odules and tubercles were distinctly perceptible 

 on palpation. The bronchial lymph-glands were hypertrophied — 

 enlarged — ^hard and nodulated. Cross-section of the pulmonary tis- 

 sues revealed the presence of numerous tubercles and tuberculous 

 devastations ; large and small cavities filled with a muco-punilent 

 mass, others with caseous material; numerous miliary tubercles 

 were disjjersed over the pulmonary tissue." 



With the milk from this cow were fed two calves, two pigs, one 

 sheep, and two rabbits. The first calf died from an accidentally ac- 

 quired disease. 



Calf No. 2. — A healthy, well-nourished caK, eight days old, 

 was fed with milk from the above-mentioned cow, for a period ex- 

 tending over one and two thirds months ; at first it received 1,000 

 and later 300 grammes of milk daily, an average of about 650 

 grammes per day ; in fifty days the whole quantity of milk con- 

 sumed amounted to from 30 to 32 kilogrammes. Aside from this 

 the calf received other milk ; later, diluted milk and oatmeal. 

 Neither phenomena indicating the presence of disease, nor disturb- 

 ance of the nutritive functions, were observable. The calf was 

 killed one hundred days from the time that the experimental feed- 

 ing began, and fifty days after the feeding with milk from the tu- 

 berculous cow had ceased. 



Autopsy. — The pleura of the shai*p edges of the right lung was 

 covered with delicate red, filamentous excrescences, which extend- 

 ed as a fringe about a centimetre beyond the edge of the lung. 

 Here and there this neoplastic production formed a connected mem- 

 brane in which were to be seen miliary tubercles, as refracting 

 points. The costal pleura, the inner lining of the ribs, was also irreg- 

 ularly covered with a membrane of similar character. In the lungs 

 were to be seen tubercles, otherwise the parenchyma was normal ; 

 immediately under the pleura were to be seen four small and six 

 miliary tubercles, and eight more were to be seen in the loose inter- 



