The blood is of tarry consistency, not firmly coagulated, and blackish in color.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
The blood is dark and imperfectly coagulated.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
The blood becomes coagulated in the vessel.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler