148 H^majiatics. 
4. I had at firft no brafs Cock at the Bot- 1 
tom of the Barrel, but being apprehenfive : 
that the Liquor which firft flowed into the Ar- J 
tcries, before the Barrel was full, might not 
go to the Extremities, for want of a fufficient 
Impetus from a greater perpendicular Height, 
I therefore fixed a brafs Cock at the bottom of 
the Barrel, which being ftopped till the Bar- | 
rel and Tunnel was full, was then immedi- 
ately opened to let the Liquor ru(h into the | 
Arteries with a full Impetus. This Method j 
did fometimes fucceed pretty well, but fome- | 
times no better than the other, which made 
me fufped, that the Vermilion might by its 
great fpecific Gravity, fubfide in too great | 
Qiiantity towards the Bottom of the Barrel, 
before’ the Cock was opened. 
j. One of the Barrels was 4-f*t Feet, and 
the other 5+1 Feet long 5 I fometimes ufed 
them fingly, and fometimes joined together in 
one Tube ; this Column of ten Feet never 
caufed any Blotches in the Injection. 
6. The Mixture 1 made ufe of was the fol- 
lowing, *vtz. white Rofin and Tallow of each 
two Ounces, melted and ftrained thro'Linnen, 
to which was added three Ounces of Vermi- 
lion, or finely ground Indigo, which was firft 
well 
