1922.] ** Renal Portal”? System. 185 
75 urine ”’ = 0:000080 gm. 
Ec.e. sertoting fluid = 0: 000233 gm. 
Thus, though the Anica’ = the heart cannula pressure from 0 cm. to 
2°5 cms. did not lower the of flow of fluid through Fag kidney, this 
with the rate “a excretion, slightly sgeeteasiba. nit t e 2nd sample of 
(2°5 cms.) urine in nitrogen compared with pi first. Subse 
quent samples vot ayilng “exhibit Sepa ies ini in page strongth 
and rates of excretion of the samples consequent on the raising of 
the thuid — in the post- cecal vein (and ace capillaries g 
EXprrRiImMent 2 (for es me chloride strengths of ur ae Identi- 
cal with, re last Aes nt. Experi iments set 9°30. 
Ocm. 100-11°0 IL + th ute ak token pote urine.’ 
ue renal artery rate of tion at = 56°5 c.c. per 
30 minutes 
5% io cannula rate of outflow = 62 ¢c.c. per 30 
At 11-1 I raised the heart cannula tubing to a height of 5 cms. 
above the ety of the heart (at 11°5 both the ligatured r.a.v. are 
well filled 0 
50 coms. “11> 20-1 60 LL perrieteg ‘4c.c. (30 m.)=** 1st 5:0 ems. urine,” 
nal ar rate of perfusion = 71 c.c. per 30 
eas 
+ heart cannula rate of outflow=48°5 c.c. per 30 
Ty es. 
t 11°52 I raised the heart cannula tubing to 7°5 cms, 
7:5 a 12°5-12°35 eae IR = .1:20.¢,c. (30. m.) — ‘7°65. ems. 
re renal artery rate of perfusion = 66 c.c. per 30 
nutes. 
al rt cannulae rate of outflow = nil. 
At 12°36 I lowered the hear t cannula tubing to 0 cm, again (when 
i ae of fluid flowed viet = the tubing). 
0 cm. 50-135 =IVL =ietoes (45 m.) = cyst glies 
jen NAVE contains about 3 times as mu 
ct as IVL: IIR shorates pir a alight 
excess over ITIL). 
[ - ren =o — rate of perfusion = 86 c.c. (!) oft 
30 m es. 
Ps heart “cannula ‘rate of outflow = 78°3 c.c. per | 
30 minutes. 
At I|- o I — the hese cannula ones again to 50 cms. 
50 ems. 1:50-2- VL + VR = 1°35 c.c. (30 m.) =“ 2nd 5:0 c¢ 
urine.” (VR cuinhaicied only a little more dietiie 
than VL. 
( * renal artery rate of perfusion = 79 c.c. per 30 
3 minutes, 
[ - — a rate of outflow = 33 c.c. a 
At 2 gee i at gag the. pa cannula tubing agin t 0 cm, 
0 em. peal VIR Tl c.c, (30 m.)= ok 6 oni drins 
[ os ee perfusion = 90 c.c. ee 30) 
utes. 
[ is hear — rate of outflow = 81 ¢.c. per ‘ of 
min : 
Nitrogen iad Chloride Stren 
hs. 
‘Ist Ocm. urine’? = 0000166 gm. Nitrogen, and Chloride in the 
eigen of 1-9. 

These chloride quantities are only expressed as ratios because 
the samples of urine for chloride estimation were in each case taken up 
