112 THE LUNG PLAGUE OF CATTLE. 



In the above cases most of the drain .age must be through the floor of the stable into 

 the ground ; it does not appear, however, that this has any injurious effect on the 

 cows. 



In all the stables except one the ventilation was not bad, but in the exception the 

 roof was so low that good ventilation was impossible. This did not appear, however, 

 to be the occasion of disease. 



On the 4th of November examined 4 cows at Mr. Sexton's, Baker street, near the De- 

 troit cattle-yards, Twentieth street. He buys his cows in the city. Has not lost any 

 cows by disease. Feeds his cows on hay and middlings. Roof was about 10 feet high 

 and there was ample space behind the cows ; and the stable may be described as a 

 comfortable one. Most of the drainage would be through the floor into the ground. 



Mr. Stagg, Twentieth street, has 10 cows. Has not lost ;niy rows for two years, 

 but three years ago lost 8 by the Texas cattle fever. This was contracted by Mr. 

 Stagg's cows being turned out on a common on which Texan cattle had been grazing. 

 Has had no losses since the enforcement of the State law in reference to Texan cattle. 

 Feeds hay and refuse corn from glucose factory. Roof of stable very low and amount 

 of space allowed to each cow small. This does not appear to have injurious influence 

 on their health, as Mr. Stagg has had 110 sickness among his cows since his losses by 

 the Texas cattle disease. 



On 31st December, 1881, called at Mr. P. H. Guilds', Holden road. He keeps 27 

 cows. They have been bought at King's cattle-yard, and occasionally from farmers. 

 Cows get hay and refuse corn from glucose factory. Has had no sickness or losses 

 among his cows. In his largest stable where most of his cows are kept, there is 525 

 cubic feet of space for each cow. He was also feeding 20 yearlings on cornstalks and 

 hay. The barn in which they were was about 20 feet high, so they hada plentiful 

 supply of air. The drainage apparently passed through the floor and soaked into the 

 ground. 



Mr. Jackson, Holden road, has 6 cows. The roof of his stable was about 6 feet 

 high. I calculated that there was 240 cubic feet of air for each cow in his stable. 

 The weather was cold on the occasion of my visit, and the stable did not seem close 

 or oppressive on entering. He feeds his cows hay and corn in the ear. He had had 

 no sickness among his cows, and they appeared to be in good health. In several other 

 stables which I examined the number of cubic feet of air to each cow was almost as 

 small as in this case, but I was unable to discover that the cows suffered in conse- 

 quence. 



Mr. Dimmick, Brady street, has 22 cows. Purchased them from the former proprie- 

 tor a few months ago. Feeds hay, grains, and tine middlings to his cows. Has not 

 lost any by sickness since he owned them. The cows all appeared to be in good health. 

 I calculated that in his main stable there would be 540 cubic feet of air for each cow. 

 In another smaller, stable where two were kept, the supply of air would be much 

 larger than this, owing to the roof being higher. In the larger stable, however, there 

 was a shaft running up through the loft to allow the vitiated air to escape. 



As a result of my examination of dairy cows and cow-sheds, I was unable to trace 

 that the conditions in which the cows were kept had any effect in originating con- 

 tagious disease. 



4. POST-MORTEM EXAMINATION OF COWS DYING IN DETROIT DURING 



MY INSPECTORSHIP. 



Having requested Mr. Parker, of Detroit, who has a rendering establishment about 

 six miles below Detroit, to inform me when any dead cow r s were brought there, I made 

 a visit to that establishment on the 9th of September. I made a, post-mortem of a red 

 cow which was eight or nine years old, which I found to be effected with splenization 

 of the anterior half of left lung and of the anterior third of right lung. The sections 

 made showed in some places bands of yellow lymph effused between the lobules. The 

 pleura which covered the inflamed lung was of a dark-red color, but it was not per- 

 ceptibly thickened, nor was there any false membrane on it. The costal pleura in 

 patches had the same red color as the pleura covering the inflamed lung. The dis- 

 coloration of the costal pleura was in the region corresponding to the inflamed por- 

 tions of lung. Both sides of the heart were tilled with what was evidently a post- 

 mortem clot. There was no effusion in the cavity of the chest or in the pericardium. 



On the 12th September I called on Mr. Fisher, who was the owner of the cow 

 which had died. Found that she had been sick about six days ; that he had treated 

 her himself, and that she had previous to this sickness been rather a delicate animal. 

 She had been raised on a farm near Mount Clemens, about 20 miles from Detroit. His 

 other cows were in good health and had been raised in Michigan, and had not for a 

 considerable time before his cow died purchased any new cows. 



The attack of sickness occurred during very warm weather, and the roof of his 

 stable was very low the amount of breathing space being consequently very small 



