406 CONTRIBUTIONS TO ZOOLOGICAL PATHOLOGY. 
Mr. Lawrence’s “ own brown mare, known by the name of Betty 
Bloss,” * * “ trotted fifteen miles in one hour, carrying fourteen 
stone.” Lastly, according to the same authority, “ the brown 
mare Phenomena performed seventeen miles in less than fifty-three 
minutes, carrying a lad of five stone in weight ; and her proprietor 
afterwards offered to match her to do nineteen, and after that 
nineteen and a half miles within the hour, both of which offers 
were declined. 
In our own days the Americans appear to have carried off the 
palm for fast trotting. Ripton trotted two miles in harness, over 
a race-course, in five minutes and thirty-five seconds. Another 
horse, whose name I have not by me, trotted a mile in two mi- 
nutes and (I think) twenty-eight seconds. 
CONTRIBUTIONS TO ZOOLOGICAL PATHOLOGY. 
By James Mercer, M.D., Fellow of the Royal College of Sur- 
geons, and Lecturer on Anatomy, fyc. Edinburgh. 
[Continued from p. 354.] 
VII. — On the Nature and Treatment of Polypus in the Ear 
of the Dog. 
There are few cases in the entire range of the practice of the 
veterinary surgeon in which his skill and tact in the diagnosis of 
abstract disease are more called into operation than in those in 
which, though there may be comparatively slight morbid effects, 
yet there may be the most important functional derangement in 
the animal, and which circumstance may set entirely aside his 
utility. Of such cases are those to which the following belongs ; 
and in placing it before the notice of the veterinarian, I am only 
actuated by the feeling, that there may be many cases that shall 
occur to him in future of a nature similar to that which I shall 
narrate, and in which the scientific principles of diagnosis may be 
called into operation, and the most important benefits conferred, 
not only on the suffering animal, but also on its benefactor and 
his employer. 
In the common course of veterinary practice, it is admitted that 
“ of the occasional existence of deafness in the lower animals 
there is no doubt;” but as to the special pathological cause of such, 
in these individual instances, there is no sufficient determination. 
