(' ? 28 > 
abundance of (mall Tendons to be inferred into the e 
Valves, were proportionably augmented in Bignefs. 
8: The femilunary Valves in the Mouth of the Aorta , 
or ofthat great Vena pulfatilts that difpenfes the Blood to 
all the feveral parts of the human Body, were very much 
preternaturally affebled ; as would eafily appear upon 
comparing them with thofe in the Orifice of the pulmana- 
ry Artery , in which they are thin and Very broad, fo asro 
be able to fhut the Cavity of chat Veflel. and hinder the 
Blood from returning back into the Ventricle, and like- 
wife tranfparent : but in this they are very thick, contra, 
cted as it were, and furled together, and of a whitifh 
Colour ; and in all appearance, if the Perfon had lived 
longer, they had turned boney or undergone a Petrifi- 
cation. 
This uncommon Structure of the Heart being thus de- 
monftrated, let us endeavour to account for the follow- 
ing Phenomena. The firfl is the Palpitation of the Heart, 
which was the chief Symptom and Complaint of the Pick 
Perion. The fecond is the preternatural Dilatation and 
Enlargement of the left Ventricle, h is not impro- 
bable but the firm adhefion of the CapfUla Cordis membrano- 
fa to the fubftance of the Heart, occafioned that un- 
common trembling and throbbing thereof: its free and. 
eafy Motion being hindered by that thick involucrum 
which furrounded it fo clofe on each fide. The learned 
Dr. Lower, in his elaborate Treatife de Corde humano 
gives us fuch an infiance; and explains the Palpitation 
after this manner.- 
As for the fecond, viz, the Dilatation of the lefc Ven- 
tricle and mu.fcular Bag of the Pulmonary f^Lin 5 that is al- 
together owing to the ill configuration of the halves we 
have now defcribed : for as the great Artery or Aorta ari- 
fes out of this Ventricle, it has three Valves wh'ich depa- 
rting give paffage to the. Blood, from the Ventricle into 
the 
