4^o Mr. Home's Observations on Blood 
part became clear, and free from the red tinge, and the sedi- 
ment had the appearance of a whitish powder. From this 
time the quantity of white sediment increased, and the size of 
the coagulum diminished. In its decrease from this period 
the loss was from its external surface, and nearly equally all 
round ; what remained appearing like the nucleus of the origi- 
nal coagulum. On the twenty -fifth day, it was of the size of a 
large cherry, and on the twenty-ninth it entirely disappeared. 
Some red globules were very distinctly seen in the sediment 
along with the white powder. 
To see how far the changes the blood had undergone in 
this experiment depended on the peculiar properties of the 
urine, the following experiment was made, with blood and 
common water. 
Experiment iii. Six ounces of blood were drawn from the 
arm into 6 ounces of water. In a quarter of an hour, the 
whole became one solid coagulum. In twelve hours, 6 ounces 
of a clear water, of a bright red colour, were separated, nor 
did it on standing deposite any sediment. 
This coagulum had fresh water added to it twice a day, and 
what was poured off was allowed to stand for examination. 
The coagulum on the second day began to break ; on the 
fifth had a putrid smell ; and in eighteen days was almost en- 
tirely dissolved. 
The water which was poured off was of a bright red colour 
from the beginning to the end of the experiment, in conse^ 
quence of the red globules being dissolved ; it had a very of- 
fensive smell, but never deposited any white sediment ; the 
coagulating lymph dissolving from putrefaction. 
As it is evident, from the result of the last experiment, that 
