198 
Proceedings of the Royal Society 
Table III. 
Comparative Rate of Flow of Water , Defibrinated Ox-Blood , Serum 
of Blood ( obtained from same sample of Blood), and Defibrinated 
Sheep's Blood. 
No. of 
Experi- 
ments. 
Fluid used. 
Diameter 
of Tube. 
Length 
of Tube. 
Tempera- 
ture. 
Pressure. 
Time 
occupied 
by Flow of 
100 Cubic 
Cents 
in Seconds. 
36 
Water, 
mm. 
1-214 
mm. 
908-9 
12°-0C 
mm. 
598-7 
68-16 
37* 
Serum of ox-blood, 
,, 
,, 
13-1 
,, 
9710 
38 
,, 
,, 
,, 
,, 
,, 
9814 
38 
,, 
,, 
,, 
16°"0 
,, 
94-50 
40 
Defibrinated ox- ) 
blood, . . \ 
>> 
>> 
365-7 
41+ 
Defibrinated ) 
sheep’s blood, $ 
” 
” 
18°-0 
” 
260-2 
III. — On the Rate of Flow of Pure (i.e., uncoagulated) Blood at the 
Temperature of Body through Narrow Tubes. 
Exp. 43. — In this experiment a calf, about a week old, was made 
use of. The jugular vein on the left side having been exposed, an 
opening was made into it as low in the neck as possible, and a 
flexible catheter was passed into the right side of the heart ; the 
venous blood used was thus obtained. 
Thereafter the carotid artery was exposed on the same side, 
and a ligature having been applied on the distal side of the 
exposed portion, a tube was introduced into the cardiac end. From 
this tube was obtained the arterial blood used in the experiment. 
The temperature of the calf before the experiment was, 38°-8 C. 
After the experiment, .... 38 0, 7 0. 
The blood was received directly into graduated tubes heated to 
38-°8 0. 
* Solids in 1000 parts of serum, 90-41 
Water, 909-59 
f Solids in 1000 parts of the blood, 212-21 
Water, . 787-79 
