"On the 15th day of July, 1884, Dr. Trumbower was requested to visit a cow at Sterling, Illinois, belonging to Mr. C. A. Keefer. He found one of Mr. Keefer's pure bred Jersey cows, aged about six years, with symptoms of pleuro-pneumonia." Mr. Keefer had bought this cow, Lass O' Lowrie, from Mr. W. C. Clark, of Geneva, Illinois, on June 6, of the same year. When Mr. Keefer visited Mr. Clark's farm on April 6, he saw Lass O' Lowrie with two other cows, Tama Warren, and Nutriena Tunlaw. All three of the cows had the appearance of unthriftiness, the hair was looking rough and dry, but this was attributed to a severe winter without proper care and, in the case of Lass O' Lowrie, to recent calving. Mr. Keefer bought her with the assurance that she was perfectly healthy. She was shipped June 8 and was on the road four hours. When she was driven from the car to Mr. Keefer's farm, she was noticed to cough occasionally. She had calved in March and was again pregnant. From the time Mr. Keefer bought her, she became poorer, weaker, and milk secretion became entirely suspended. She stood in the field away from the other cattle and ceased ruminating. Coughing increased in frequency and strings of mucus dropped from the nostrils. The case was thought to be one of tuberculosis and isolation was recommended, slaughter and burial to follow as soon as possible upon the necessity of the measure. On the morning of June 8, she was bled to death. On examination, the anterior lobe of the right lung was found filled with tubercles covering a space of four inches in diameter. They presented different stages of development; some containing a thick yellow inspissated pus, while others were undergoing a caseous degeneration or calcification, and still others appeared as small indurated brown or reddish circumscribed spots in the interlobular tissue. Beginning at the bifurcation of the trachea and extending downward and backward, was found a cavity about ten inches in length, which contained a pint of fluid of a grayish-black color and of very offensive odor, holding in suspension disintegrated lung tissue; also in this cavity was found a mass of inforcated lung tissue weighing two pounds. The part nearest the right lung was breaking down and liquifying. Another mass of dead lung, weighing four ounces, of a yellow, granular, or caseous appearance, indicating that it was much older than the larger mass, was found lying in and partially buried in a separate sack which communicated with the larger cavity. In the abdominal lymphatic glands these were masses of compact tuberculous matter encysted in strong fibrous capsules, one of which measured three inches in diameter.