( 1148 J 
to Cough and Spit, for how eafily may the Globules 
Bloodln the fine Vefiels of the Lungs be coagulated by the 
Cold. 
In order toget a further Light into thefe matters, I toot 
the fmalieftot the Lungs of two feveral Sheep, that I 
might view thofe parts with the Microfcope, and I was 
amazed to difcover that the Air Vefiels were filled with 
1%/ or Matter, even at the extremity or (malleft part of the. 
Lungs. - 
I got a Butcher, that was a good underftanding man, to 
come and view the faid Lungs, and I ask*d him what was 
the Diftemper of that Sheep ^ he felt the Lungs in feveral 
places, and lhow*d me fome hard parts about the length 
and breadth of two Fingers^ and told me that that Sheep 
had caught cold, and that had occafioned that Difeafe of 
his Lungs 5 and the fame thing was attetled by feveral other 
Butchers 5 I askt them whither the Sheep would not have 
died of that Difeafe, bur. was anfwered, that thofe hard 
places often difappear and remove again. 
I could not difcover the leaft Phs or Matter in the Air 
Veflels of the Lungs of two other Sheep, thofe Lungs were 
of an agreeable Colour, and like the other. 
Having view'd the outfide of the Lungs of a Sheep that 
had not been diftemper'd, it ftemy to me that a great 
many fmall Tranfparent Globules lay under the Membrane 5 
but when Lfeparated the Membrane from the Liver, thofe 
Tranfparent Globules appeared to be nothing elfe bur fmall 
Particles of Air preft together into different and irregular 
Figures 5 and thofe Air Globi^les feem to lye out of the Air 
Veffels. 
I took feveral pieces of the Lungs, and preft the Blood 
out of the Veffels in which it lay, as alfo their Air, and 
was amazed at the infinite number of Bubbles of Air that 
came out of the Veffels, of which fome of them were fo 
exceeding fmall, that they even efcaped the fight of my 
Microfcopes^ thofe Globules I did fuppofe to be contained 
