An ExtraU 
Of a Letter of (s5Vf. Pecquet to (if7i<f.Caiv 
cavi , concerning a New Difcovcry of the 
Communication of the Ductus Thoracicus 
ri^ith the Emulgent Vein : T^a^n out of the 
Journal des Scavans , ^s(\^ VIL i66j. 
1 Cannot forbear longer to inform you of the Experiments 5 
which M.PwW^, M.Gajant^mil^ made laft N'"ght upoa 
the Corp^ of a Woman ^ that died fome few dayes after Ibe was 
brought to bed. 
Our Defign was to continue the Difcovery of the Veffels , that 
carry the Chyle to the Breafts , of which I have indicated the 
Way, /^^^.134. of the Second Edition of my Jnatom, Experi- 
ments y printed 1654. But the Body being not fii for that , we 
referred the fearch thereof to another time 5 and we have had the 
good fortune to make another Difcovery , which may prove not 
lefs ufeful to Phjftck'^ it is the Communication of the MtlkjChanneh , 
now call'd the BulJus ihotmcus 5 vptth the Bmulgent Vein. The 
Experiments were thefe : 
M. Gay ant having difcovered the Ductus ihoracicm upon tKe 
7 th and 8th of the Vertebras defcending from the Back ^ inferted 
a Quill into the faid Ductus , and having tied it upon the Quill , he. 
did blow into it : whereupon the BuBus was ffll'd with wlpd from 
the Quill unto the SubcUmal Vein. This wind ififued at the A-- 
fc ending Cava , which had been cut > when he , whofe the Corps 
was 5 had lifted up the heart to make the demonftration of it^ . 
M, Gay ant would tie this Cava ^ but it was cut fofliort, that the 
I^igature could not hinder the wind to iCTue out of it > which was the 
caufe, that it could not be thruft as far as the Breato3 F would 
fupply this defe<ii , bycomprefling with my finger that place of 
the Vein 5 at which the wind came out (which was at about the 
third Vertcbray defcending from the Back } and M, Gay ant having! 
blown 
