Blood Flow in the Arm and Hand. hi 
Table. 
Per Cent. Reducing Substance in Blood of Vena Cava Inferior Opposite En- 
trance of Hepatic Veins in Dogs Fed with Excess of Carbohydrate. 
A. Without Excision of Suprarenal. 
No. of 
Expt. 
16 
18 
19 
20 
21 
24 
{ 
25 
{ 
32 
{ 
Before Stimulating. 
O.136 
O.124 
O.I30 
O.199 
O.151 
0.132 
0.121 (30 min. later) 
0.194 
0.213 (30 min. later) 
O.III 
0.122 (30 min. later) 
During Stimulation. 
0.176 (7 min.) 1 
0.1 10 (7 min.) 
0.176 (10 min.) 
0.265 (5 min.) 
0.195 (7 min.) 
0.154 (7 min.) 
0.280 (5 min.) 
0.166 (9 min.) 
After stimulation 
Removed. 
0.184 (10 min.) 2 
0.144 (30 min.) 
0.148 (30 min.) 
0.415 (30 min.) 
0.168 (23 min.) 
Remarks. 
No rise in 
blood pres- 
sure. 
B. After Removal of Left Suprarenal Capsule. 
27 
28 
29 
30 
3i 
0.118 
0.120 
0.082 (30 min. later) 
0.171 
0.173 (30 min. later) 
0.163 
0.127 (30 min. later) 
0.249 
0.248 (25 min. later) 
0.124 (10 min.) 
0.109 (25 min.) 
0.101 (5 min.) 
0.103 (20 min.) 
0.177 (16 min.) 
0.113 (15 min.) 
0.270 (5 min.) 
0.256 (20 min.) 
In every case, but one (no. 18) in which the suprarenal was 
intact there was a distinct increase in the reducing power of the 
blood, but when the suprarenal was exsected no increase occurred 
(except a slight transitory increase in no. 31). The blood pres- 
sure rose in all cases except no. 18. 
68 (593) 
Comparison between the blood flow in the arm and in the hand. 
By A. W. HEWLETT and J. G. Van Zwaluwenburg. 
[From the Department of Internal Medicine, University of Michigan.] 
In 1909 the authors published a plethysmograph method for 
determining the rate of blood flow in the arm (Heart, I., 87) 
The results obtain ed by this method for normal individuals, partly 
1 The time periods in brackets indicate when the specimens of blood were removed 
in (1) after the beginning of stimulation; in (2) after the stimulation had been dis- 
continued. 
