698 
PROFESSOR HARLEY ON THE INFLUENCE OF 
arterial hue when well shaken with air, although it had a film of fungi on its surface, 
and smelt strongly as if it were putrid. When once arterialized it looked exactly like 
freshly-drawn blood, and when examined microscopically it showed the red blood-corpus- 
cles as well as if it had only been a day old. Indeed, by its previous history, and smell 
alone, could a stranger have had any idea of its having been drawn from the animal more 
than a few hours. The fourth portion was treated in a similar manner, and for the same 
length of time as the others. 
In this case, for some cause or other, no explosion could be obtained, even after the 
addition of 50 per cent, of explosive gas. Result : — 
No. 24. — In 100 parts of air. 
Oxygen .... OOO 
Carbonic acid . . 4-91 
Nitrogen . . . 95'09 
The blood after 304 hours’ exposure still arterialized when well agitated with air. On 
using the microscope, the corpuscles were found to be distinct, though not so numerous 
as at first. They were best seen without adding water. Indeed the addition of water 
almost totally destroyed them by instantly dissolving their attenuated walls and allowing 
their contents to escape. 
A fifth portion of this blood was treated precisely as the preceding examples with 100 
per cent, of air in one of the usual glass receivers, the temperature of the room varying, 
as before, from 6° to 12° C. 
The oxygen, if there was any, was not estimated. 
No. 25. — In 100 parts of air. 
Carbonic acid . . 4’99 
The blood after being kept 688 hours still arterialized on being thoroughly shaken 
with renewed portions of air. It was fearfully fetid, and contained numbers of living 
animalcules of the Vibrio class. The red corpuscles were still distinct, though in greatly 
diminished quantity, from numbers of them having become broken up and dissolved *. 
The usual quantity of this blood was put into the receiver with 100 per cent, of air 
and treated during twenty-four hours in the ordinary manner. 
No. 26. — In 100 parts of airf. 
Carbonic acid . . 5T1 
* This series of experiments was performed in the winter months, but in one conducted during the months 
of April, Hay, June, and July, I was able to detect blood-corpuscles in the putrid fluid after it was three months 
and seven days old ; so that blood-corpuscles appear to be much more persistent bodies than is in general 
imagined. 
t The oxygen was also estimated in this case, but unfortunately without a controlling experiment being at 
the same time performed, so it is of little value. The following is the result of the analysis. 
