20 Hcemajlatics. 
of Paper aptly cut to the irregular Form of 
the feveral Parts of the Wax; and then lay- 
ing thofc Papers under another Paper which 
was equally divided into little Squares of i 
Inch each ; by running a Pin thro’ both Pa- 
pers at every Corner of each Square, the un- 
der Papers being thus marked too, it was ea- 
fy by numbering their feveral Squares and Parts 
of a Square, to come pretty nearly to an EF 
timate of the whole inward Surface of the 
Ventricle : Which I by this means found to 
be equal to 26 fquare Inches, deducing one 
fqnare Inch for the Area of the Orifice of the 
Aorta^ whofe Diameter I meafured from the 
injecled Wax. 
15). The Diameter of the Aorta juft before 
the coronary Artery branches from ir, w^as 
• 1. 15 Inch. 
Whence its Area 1.0^6 fquare Inch. 
The Diameter of the defeending Awta 
c.^5, its Area 0.677. 
The Diameter of the afeending Aorta 0.74, 
its Area 0.365?. 
20. The inward Area of the Sides of the 
left Ventricle being therefore equal to 16 
Square Inches 5 the Sum of the whole Pref- 
fure of the Blood againft all the Sides of that 
Ventricle, • 
