/ ( ^HP ) 
in ^ery fine Veffels, and when the Blood and the Air was 
fqiieez'd out of that part of the Lungs.where there were no 
great Veflels, the remaining ones, whofe Tunics vv^ere ex- 
ceeding fine, made together but a very imall Portion of 
Matter. 
Moreover, I took the unfound Lungs of two other Sheep, 
and found in the handling that their parts were much harder 
than others that were nor diftemper*d,and that the Matter or 
was ftiffer or thicker in thofe Lungs, than in the above- 
mentioned : looking on the external parts of thefe Lungs, I 
perceived in feveral places thereof Pellucid Particks^wbich 
far exceeded in largenels the Globules of Air {poken of be- 
fore. 
Thefe clear Particles were in foma places oi a greyifh 
colour, but in others fomething darker. 
Having taken the laft mentioned Particles our of the 
Lungs, they feem'd to be nothing but a hard Matter^ and 
the more, becaufe upon parting them I could fee no Air 
Globules among them 5 whereas in found Lungs, how 
fmall foever the pieces thereof were, I could eafily difcover 
that ( except the Veins^ they confided moftly of Air Glo- 
bules, which were not fhut up within the Veins. 
Now if the faid Tranfparent Particles were not in found 
Lungs, I (hould conclude that all thofe Particles would 
turn to a thin Mdlter^ in order to be caft out of the Lungs 
by the Sheep if it (hould recover its former health. 
If we look upon found Lungs, wefhould be apt to affirm 
that thofe alfo confided of fuch Tranfparent Particles, but 
upon a nearer view, I found that that Phenomenon was on- 
ly occafioned by a multitude of Blood VelTels lying vvithin 
the Membrane of the Lungs, and in feveral places feeming. 
to divide the Globules of Air. 
Being perfwaded now that all the Diftempers in the 
Lungs of Sheep are occafion'd by the Cold Air which thofe 
Bcafts fucJkin, I ask'd two Butchers whence they thought 
die Difeafes of their Lungs to proceed, they anfv/er'd, that 
the 
