( *r ) 
I had at the fame time an opportunity of feeing 
fame Pleuritick Blood* and thought, that its Branches 
fpread in a different Method from the found, and more 
ftrongly perplex’d with overthwart Branches, which ap- 
peared black, like Blood that had (food two or three 
Days. Whether the Attraction of Particles arifing 
from this difference of Figure, may not render the 
Blood incapable of paffmg through the Capillary Ar- 
teries of the Pleura in that cafe, I’ll leave it to my 
Betters to judge * I ffiould think, that fince the Pro- 
pellent force of the Heart is leaft at the Capillary Ar- 
teries, then there the attra&ive force of the Particles 
of the Blood (hould be greateft * and fince Spherical 
Bodies are the moft attra&ive of any, refpefr being had 
to tbeir Solidities, were the Blood lo plentifully ftock’d 
with Globules, as fome fay, we (hould never be free 
from Obftru&ions, the Natural Confequence of this 
attraftive force. If my Glafles have deceived me, 
and this that I have written be found to be a miftake, 
no Man (ball be more ready to retraft and acknowledge 
it than, 
Sir , 
Tour ajfured humble 
and obliged Servant , 
% 
, Archibald Adams« 
V. An 
/ 
