( 47 * ') 
Now when thefe Surfaces become infinitely fmall, 
one terminates in the Point of Centafr, and the other 
in the Periphery of the Bafe of the Cylinder. There- 
fore the Point of- Gofife& is equal to the Periphery of 
the Bafe of the Cylinder (equal to a Periphery whic^i 
has the fame Diameter as the Sphere) and by confequenee 
is infinitely greater than any point of Contad between 
a Circlr and a Tangent. E. D. 0il - 
• e» - *•*•/ • o / ** * 4 * • • 
‘W4 w t- l jiti V .tUi J i . £ b t> * ■ a i * . >1 
PROP. III. 
The Points of Contact by Spheres of different Magnitude 
are to one another as the Diameters of the Spheres. 
n ' . ■ ■ ' ' . . . i . ■' 
For by the fecond Propofition the Points of Conta& 
-are equal to the Peripheries of fuch Diameters, whofe 
proportion is the fame as the Diameters. 
Q E. D. 
T * Vn* 
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VIII. Jn 
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