1922. ] ‘* Renal Portal’’ System. 189 
At 12-15 1 inserted the same cannula under the 
it 
Post-caval second pair tube 
perfusion. 
L+IIR = 4°65 e.c. (30 m.) [1 rags 
{ 12°30-1-0 the post caval vein pect 1187 ‘nels 
i {!) most of which was doubtless lost by extra- 
| 
ugh t lls of 
self and the intertubular capillaries or pa ag 
via the nephrostomes which open into the veins 
DU 4 ‘000215 gm. ae sae 
RC = pie rod 
1 c.c. perfusing fluid = 0 0001 
DC=> ‘005406 gm. "Chloride as NaCl. 
RC = 0-006154 g ve 
ual, of pressure ety aes the urine in nitrogen and 
“ énaiens it ix in onal (Appendix G). The pthiee results are as in the 
ment (E 
uring arterial perfusion cats. of flow = 61 ce. per 30 minutes) _ 
reduced to 15°5 ems. during emcees’ 9p (rate of flow 67¢ 
per 30 minutes) I obtained “4 0¢.c doe 066 gm. nitrogen s absent 
P e 
fusion than during the arterial perfusion, much of the fluid during the 
former ijoreneed extravasating and therefore not reaching the plexus. 
t ad oo = gave similar results. 
experiments the quantities “of urine bore no relation at all 
a seat elinet ths glomeruli or in the Startabilar plexus: on 
the other pond, though no strict proportionality apparently existed, et 
there was a ways some relation between hah volume and rate of flow 
Experimental Series 2.—Perfusion of the rabbit’s kidney via the renal 
vein got Ai saline seme ing e.c. human urine in each 
100 ems. (water) pressure. 
jes aaaaueal Female ire The atichpataigs fluid - sorb eager 
s kept at an almost constant te of 
ney C Pook arying more than 1° by vi ca of 
boiling water circulating through a coil of rubber 
tu placed inside the bottl rature 
of the fluid in kid of sever 
lo 
with two cannulae. During the first of 
can 
two renal arteries of the two kidneys, the ren 
vein of each kidney being lestuoed and a slit 
