42 Mil. SEWELUS INTRODUCTORY LECTURE, 1827 . 
ed, and destroyed. In the early stage, even of this condition of 
lung, Mr. S. has no doubt many would recover. This suppu¬ 
ration goes on to become very offensive and fetid. He has 
endeavoured to ascertain whether the matter taken from one 
of these tubercles would produce disease by inoculation: and 
he finds that by tuberculous matter he can as certainly produce 
tubercles as one potatoe will produce another. Asses inoculated 
with such matter have had tubercles produced within their 
lungs in the space of five days; and he knows this for certain, 
because it is a very rare occurrence to meet with an ass with tu- 
bercled lungs. Mr. S. believes the lungs to be the seat and ori¬ 
gin of glanders ; and the affection of the nostrils to be secondary. 
Here is another specimen of morbid anatomy. In examin¬ 
ing the left ventricle of the hearts of horses and other animals 
that have died of hydrophobia, Mr. S. has invariably found a 
large coagulum, forming an ecchymosis, adhering so strongly to 
the substance of the heart that we may tear it: this has not been 
noticed that he knows of; although it is not confined to these 
cases; it may be seen in all subjects dying suddenly and vio¬ 
lently with strong pulsations of the heart. 
Within these four years Mr. S. has made also another dis¬ 
covery. The nature of stringhalt, concerning which he made 
inquiries when on the Continent, but could obtain no satisfac¬ 
tory account. Some place the disease in the muscles, others 
in the spine, others in the nerves. Mr. S. finds it in the triceps 
adductor muscle: a large cyst is formed within its belly, and 
through its cavity are passing the nervous trunks; the effect 
of which morbid chano;e is the destruction of the fibrous or 
_ C-J 
muscular structure. The muscle being able no longer to act, 
and the abductors in consequence having no antagonists, the 
limb is raised from the ground with a sudden jerk. 
Mr. S.^s next dicovery is a muscle that has not been des¬ 
cribed by writers on anatomy—a muscle running across the 
trachea. The bronchial tubes also possess this muscle; but in 
them it is less distinct, so that in truth the lungs are not only 
cartilaginous and membranous, &c. in their structure, but are 
also muscular. 
Mr. S. finds that the causes of roaring and broken wind are 
now as demonstrable as any disease of the foot. That the 
former does not consist, as was believed for many years, in a 
band of limph across the windpipe, but mostly has its seat 
in the rima glottidis; though there are cases of contractions of 
the treachea, shrunk muscle, &c. 
On Tuesday, ’’ concluded Mr. S. I shall have the pleasure 
of meeting you again. But, before I leave you, I beg to say. 
