X5my 
jnExmB ofMr.John Templers LetUr of March 3^; 1^73. 
DtMslUqi Nccdhzmcmermng the smS^^ * 
^ «^1N Anfwerto the regueft of an Ingenious Dr.ofPhy^ 
*• fiek I was lately engaged to give my thoughts of 
the Strufture of theLuegs 5 which was as follows^ 
I have formerly fancied, the Lungs to be compofed of a 
multitude of veficles i Into which opinioD I was perfuaded by 
inflation into the -^^/|^^r^ arteria of Fowls 5 and obferving the 
continuation of many veficles extended from the bronchm 
thorough abdomen to the ^f?^^, (which I conceive to be 
the caufe of the conftant motion of the mm in fowls^ the Air 
having ingrefs and egrefs there ; and alfo that to be the rca- 
fon why the anui% of fowls are in malignant diftempers ap- 
plied to draw the infedion out of the bo- * rhofe onus's hdng 
dy I thence conjeduied^the fubftance ^i^^ cups or Ventou- 
of the Lungs to be a Complication of a S^^l^^.^^^^t 
multituae or vefacles with the languineous arus //// a dud^ in 
vefTels* And in this opinion I thought mv ""r^f^ thij^hor 
C^\C ^ £1 ur • • 1 (^f thps Letter affirms 
lelr confirmed by blowing into the Jfpera to have kmrpn %en 
arteria of Quadrupeds ^ when I had cut off ^^'^^^^^ cippjied to the 
part of the exterior membrane of one lobe 
of the Lungs, and found the Lungs to rife ^iiithey dud, and the 
with unequal protuberances not unlike y^''^'''\P''^^kb <>ff, 
DiadderS. after. ^ 
But this fecond contrivance^, which I am going to defcribe 
toyou, hath much fliaken that conjedure^ 
March 2, 16^5 I made a ligature about a Dogs neck / and 
opening both the Jugular veins with a pretty large orifice, I 
let him bleed to death, (ufing this way to prevent being over- 
charged either with any quantity of bloud or with blond coa^ 
gtilated • both which would have been hazarded^in cafe I had 
either ftrangled the dog^ or cut one or both of the Juaulars 
afunderO Immediately I open'd the thorax, and tying the 
vem cava.with ail the pafTages from the left ventricle of the 
Heart, or its auricula^ I cot the Lungs w<th the Heart and 
'Jfpera arteria emivdy out. ^o tkc^Afpera arteria I ficted a 
hm, loog fevenio'ehes | which i thruft two inches io length 
" , inta 
