f 59 6 1 
about a pound of bread and milk, were forced down 
the throat of a dog, that had been kept falling for 
36 hours. An hour after he had fwallowed this 
mixture, having fecured him in a fupine pofture, as 
is ufual in fuch experiments, we opened the abdo- 
men, and obferved the ladteal veflels, like white 
threads, running along the mefentery in a very beau- 
tiful manner. Upon flitting open part of the fmall 
guts, we there found a good deal of the mixture, 
which appeared frothy, but without any black co- 
lour, or the leafl: flgn of the fait being precipitated ; 
and ftruck a deep inky colour with infuflon of galls. 
Tho’ the white colour of the ladleals convinced us, 
that they were full of chyle, yet, as it would have 
been impoflible to have collected a fufficient quantity 
of it from them, we found it neceflary to open the 
thorax, and tie the thoracic dudl a little above the 
receptacle, which, from the ligature, foon became 
turgid, the animal being alive and warm, and the 
chyle ftill continuing its courfe towards the thoracic 
du£t. Having cut open the receptacle, we eafily 
collected a fufficient quantity of chyle, and immedi- 
ately mixed therewith, drop by drop, infuflon of 
galls ; a very Ample and eafy method, by which an 
incredibly fmall quantity of fait of fteel may be 
difcovered in mofl: liquors : but not the fmallefl: 
change of colour was obferved, tho’ they were 
rubbed together for fome time, and allowed to ftand 
feveral hours. Now had there been a Angle atom 
(fo to fpeak) of the fait in fo fmall a portion of chyle, 
as that ufed in this experiment, which was, as near 
as I could guefs, fomewhat lefs than half an ounce, 
it is not to be imagined, that it could have failed to 
difcover 
