57 
Hcemajiatics. 
in fmall and great Animals 5 and allowing 
thefe capillary Veflels to be a fmall Size larger 
than the Globules, which fwim in and are 
carried along by Serum which fiirrounds them 
on all Tides, we may therefore well fuppofe one 
of thefe Veflels to be double the Diameter of 
fuch a Globule, 'viz. 
or 0.00^17, the Periphery therefore of this 
Veflel will be 0.0 15)4, and its Area 0.000025)8^ 
which multipliedby 80, the Number of Inches 
to which the Blood rofe in the Tube when 
fixed to the Artery of the Dog Numb, i, gives 
0.000025)8 parts of eighty cubic Inches of 
Blood or of 11^16 Grains, equal to 1.5) 5)7 
Grains. But the Refiftance of the Blood in 
the Veins of the fame Dog being found equal 
to fix Inches Height or of eighty 
Inches, this r^^th part being deducted out 
of 1.5)57 Grain, the Remainder 1.838 Grain 
is the Force with which the Blood would be 
impelled into fuch a Capillary by a Column of 
Blood of eighty Inches Height, fuppofing it 
were in a ftagnanc Stare 5 to which alfo mull 
be added the Velocity which the Blood has ac- 
quired at its firfl: Entrance in the capillary 
VefTcl, which can be but fmall as appears by 
the great Refiftance it meets with in the capii- 
lary 
