1 8 Hcemajiatics. 
an Afliftanr, who as foon as all the Air was dri- 
ven out tyed that Branch of the Aorta to 
prevent the flowing out of the Wax. 
12. I chofe this Method of injeding from 
a perpendicular Height rather than by a Sy- 
ringe, both becaufe I was by this means aflur- 
ed of the Force with which the injeded Ca- 
vity of the Heart was dilated, which is more 
uncertain with a Syringe ; and alfo becaufe 
this dilating Force from the perpendicular 
Height, continued ading uniformly till the 
Wax was grown ftiflF and hard. 
15. When cutting open the left Ventricle, 
r found the Thicknefs of its mufcular Coat 
to be I -f-t Inch, and the thinnefl: Part of that 
of the right Ventricle was half an Inch. 
14. Then taking out the Wax which was 
formed in the Shape of the Ventricle, I cut 
the Wax of the left Ventricle off, where the 
Valves called Mitrales, made the Separation ; 
which Valves were propelled inward by the 
cutting Wax j and I did the fame alfo at the 
Orifice of the Aorta, where the Valves called 
Semilunares were alfo propelled inward by the 
abovementioned brafs Vent-Pipe. 
I y. And this is the proper Cavity of the lefc 
Ventricle, juft before its Contradion ; for at 
that 
