204 -Mr. Home’s Account oj a small Lobe, &c. 
less degree of the disease, although that portion of the gland, 
which forms the most important part of the complaint is wholly 
out of their reach. 
The least projection of this lobe into the bladder stretches 
the internal membrane of that viscus which passes over it, keeps 
it in a state of irritation, and makes it liable to be grasped by 
the action of the sphincter muscle in expelling the last drops 
of urine, so as to give the patient excruciating pain. When it 
is more enlarged these symptoms go off. 
From these observations it appears, that this small lobe of 
the prostate gland, which has been overlooked, is from the 
situation and the circumstances, in which it is placed more 
liable to become diseased than any other part of the gland, 
and produces symptoms of danger and distress peculiar to 
itself, which have been hitherto supposed to arise from the 
body of the gland becoming enlarged. 
To enter further into the effects of disease on this lobe 
would be improper on the present occasion ; but not to have 
noticed them at all would have been equally so, since the 
only importance, that can be attached to the facts, which 
have been brought forward in this Paper, arises from the 
light they throw on the diseases of the prostate gland. 
Explanation of the Plate. (Plate III.) 
A posterior view of the outside of the bladder and prostate 
gland. 
The vesiculae seminales and vasa deferentia are dissected 
off and turned forwards, to shew the newly discovered lobe, 
which lies between them and the bladder. The two posterior 
parts of the lateral portions are spread open to expose the 
lobe lying between them. 
