DISEASED LUNGS OF A HORSE. 
275 
elements were carried by the blood in its circulation to the 
lungs and spleen, and perhaps to other organs also, but to an 
extent not noticed. 
What could have induced such disease in the animal 
organism in the first instance ? This I will not venture to 
give an opinion upon. There may, however, have been that 
peculiar diathesis in these animals which would only require 
some exciting cause to determine active disease. We may 
safely assert, I think, that the seeds of the malady were in 
the system, although in a dormant state, long before either 
Mr. South or Mr. Clark was consulted. 
Specimens from the lungs were examined by Dr. Harley 
and also by Dr. Hicks, whose reports on them are published 
in the Medical Times of April 9th, 1864: 
“The portion of lung examined was found to be very 
slightly crepitant, and on being cut into small pieces some of 
them sank in water and others barely floated. On a naked-eye 
inspection, it appeared to contain a quantity of grayish-white 
matter, filling up the spaces of the lung-tissue. On micro¬ 
scopic examination this whitish matter was found to occupy 
the air-cells, filling up most of them more or less completely. 
It was seen to consist of corpuscles, varying somewhat in size 
and shape, the predominant form being spherical. These 
corpuscles contained much granular matter, and many of 
them appeared to be nucleated. 
“ Dr. Harley said that Dr. Quain had reminded him that 
the specimen on which Dr. Hicks had reported was very like 
one he (Dr. Harley) had received from the Veterinary 
College. On section, the lungs presented innumerable white 
spots, looking at first sight like entozoa. When he received 
the specimen it so happened that no less than seven patholo¬ 
gists were present, and none of them had seen a similar con¬ 
dition in the lungs. They were removed from a young horse, 
four years of age. The animal had had good health until six 
weeks before death, when it began gradually to lose flesh. 
The appearance of the lungs being very unusual, they were 
sent from the country to the Veterinary College, but the 
professors there said they had never seen lungs in that con¬ 
dition. Dr. Harley looked for ova, but found none; but on 
microscopical examination found appearances similar to those 
Dr. Hicks described in his report, and he had no doubt the 
specimen was some form of cancer. Unfortunately, the other 
organs had been thrown away. Dr. Harley came to the con¬ 
clusion that the cancer was secondary. Since examining this 
specimen he had received another nearly like it, but here 
