SUPPURATIV1S LARYNGITIS. 
259 
cutting straight through the posterior part of the cricoid car- 
tilage. It had a general inflammatory appearance, deadened 
here and there with adherent thick mucus and pus. The 
cordae vocales were puffy and red, and from the opening of 
the laryngeal ventricles on either side flowed a tenacious 
greenish-looking pus, which, on being cleared away, showed 
that the lining membrane of the ventricle was not ulcerated, 
but possessed a deep inflammatory redness, from which we 
might clearly infer that these lesions were those of simple 
suppurative laryngitis. The Schneiderian membrane had no 
traces of ulcerative disease on it. 
Remarks . — The owner of the horse discovered him to be a 
roarer, very shortly after he had him in his possession, and I 
consider that it is a very interesting question, in a legal point 
of view, whether the horse was a roarer from disease which 
existed at the time of sale ; and above all, whether the 
abscess in the spleen existed at the time of sale. We all 
know that large accumulations of pus frequently take place 
in an incredibly short time ; but I think all who saw this 
abscess would have come to the conclusion that it was of long 
standing, on account of the organized state of the false mem- 
branes and thickened walls of the sac. 
With regard also to the disease of roaring, from the 
appearance of the lateralis muscles, I believe that it was 
chronic. 
My dear Henderson, — I have with pleasure perused 
the history of the case of internal deposits of pus in the horse, 
to which you directed my attention after the animal’s death. 
Nothing can be added to what you have said of the larynx ; 
but with reference to the spleen, it must be remarked, that 
the tumour which we examined together seemed to have 
originated in an interstitial suppuration, checked in its 
destructive career by the deposit of organizable lymph, 
limiting the pus within circumscribed cavities ; these were 
numerous, varying in size from a pin’s head to a hen’s egg, 
and all clustered together to form one continuous mass of 
abscesses. The tissue of the spleen, towards the apex, was 
likewise infiltrated with pus ; it was red, but without signs of 
active inflammation. 
It was unfortunate that I did not see the lungs, but, so far 
as the evidence afforded by the spleen would justify an in- 
ference, the abscesses were not truly metastatic or indicative 
of purulent infection. All true pyaemic abscesses that I 
have examined, whether in veritable cases of pyaemia, or after 
experiment, have had the distinctive characters of containing 
