ON OPENING TI1E TRACHEA IN ROARING. 
531 
may, in all probability, prove interesting. Professor Sewell will, 
I doubt not, perfectly recollect the circumstance, having shewn 
the letter to him immediately after I had received it, and he was, 
I believe, at the time, induced to think it to be a case of hydro- 
phobia, an opinion with which I could not concur, although it 
was a disease of the precise nature of which I was completely 
ignorant. 
In the early part of 1820, Mr. B. was called to this horse, 
which was stated by the coachman to be mad, and he, upon 
seeing it, was almost of the same opinion ; for upon taking a 
bucket of water to him, and slightly agitating it before him, the 
most frightful convulsions were produced, and which were con- 
tinued until its removal, when he became placid, and in a few 
minutes resumed his eating, and was apparently in perfect health. 
The paroxysms would take place every time water was offered to 
him, for two or three successive days, when an intermission took 
place, and he would and could drink it for the like space of time 
without the smallest disturbance or excitement. 
In this manner the case continued for several weeks, without 
any visible or assignable cause, until accident revealed what 
science could not fathom. Mr. B. was one day on horseback 
when this horse passed in the carriage. He dunged, and Mr. B. 
examined the fseces, among which he discovered several teretes, 
when it immediately occurred to him that they might be the 
cause of this strange affection. By acting on this supposition, 
and administering hydrarg. sub. in doses of 9j daily, for three 
or four weeks, an immense quantity of these parasites were ex- 
pelled, and within the time 1 have mentioned the horse was per- 
fectly cured, never having any similar attack during the last seven 
or eight years of his life. I have myself met with a similar case, 
which yielded to the same treatment. 
ON OPENING THE TRACHEA FOR ROARING. 
By the same. 
During my apprenticeship we had a fine young mare, a 
perfect roarer, and Mr. B. being led to think that an adventi- 
tious membrane was formed in the trachea, excised portions of 
the cartilaginous rings, until he arrived at the source of ailment, 
which he removed with a scalpel, and in three weeks from the 
operation I rode her. She was perfectly sound, and continued 
so for two years. I daily used her both as a hack and hunter. 
