500 
.7. W. GADSDEN. 
the diseased lung, which was thoroughly impregnated and weighed 
thirty pounds. 
He mentions again several cases where, as an experiment, the 
food left by diseased animals was fed to healthy cattle, and in 
none of the instances above recited was a single animal affected, 
nor was the contagion conveyed to one of them. 
But perhaps the most conclusive test, and the one on the 
largest scale, was made in the city of Chicago, at the sheds of the 
Shufeldt Distillery. The sheds had been occupied by cattle 
affected with pleuro-pneumonia, 445 out of 897 being found 
diseased ; and the last ones were slaughtered on December 10, 
1886. Messrs. Shufeldt & Co. were anxious to refill their sheds, 
and made application to the State Live Stock Commissioner for 
permission to do so. Having been called upon, I gave my opinion 
that this would be entirely safe, provided the animals brought in 
were perfectly healthy. Upon Mr. Shufeldt guaranteeing this, 
the commissioners gave the necessary permit, and on December 
18, 1856, 894 fresh, healthy cattle were brought in and kept 
under strict quarantine until the time of slaughter, which was 
during June and July, 1887. Each animal was carefully inspected, 
and a post mortem examination made by Dr. John Casewell, State 
Veterinarian, a man thoroughly familiar with the disease, its 
symptoms and characteristics. He reports that these animals 
were all found free from any taint of pleuro-pneumonia. 
Although these sheds stood empty for a time and were partially 
disinfected, the flooring was not removed and the mangers and 
fixtures remained, the only essential precaution insisted on being 
that none but absolutely healthy cattle should be introduced. 
The experience in this case is not a singular one, and although 
I was looked upon as bordering on rashness in giving this opinion, 
yet from my own experience of many years, and the testimony of 
those in whom I had the most unbounded confidence, I felt assured 
that I was right, and the result has proved the correctness of my 
opinion. 
Professor Williams, Principal of the Veterinary College, 
Edinburgh, writes under date of September 19th : “ My experience 
leads me to conclude that it is safe to place cattle in sheds which 
