Note 51 — Chapter IX · ON POISONS, MIASMS AND CONTAGIONS.
Reading edition
Blood has a mordant given to it which dyes it red; when this is in excess, the blood becomes black, or very dark. This was the colour of the blood in cholera. Its crasis seemed to be broken down, and I have it on sure anatomical testimony, that in dissecting those who had died of cholera, the larger veins, when once opened, continued to pour out blood for many days.