1922.) Renal Portal’? System. 183 
At 12: “ks I Si baht the perfusion bottle to 30 cms. 
30 ems. 4th pair tubes from, 12-30-1-30. 
IVL+ VR = 17 c.c. (60 m.) = 2nd 30 ems. urine 
[12°30-1°30 renal artery rate of flow = a 5 c.¢, per 30 minutes. ] 
At 1°31 perfusion bottle lowered to 20 c 
20 cms, Put 5 ir tubes fro 2: 
VR = 1°05 c.c. (60 m.) = 2nd 20 ems. ae 
A *45-2°45 ronal artery rate of flow = 46°5 c. per 3 minutes. ] 
At 2-47 I raised the perfusion bottle Fas ad 40 ¢ 
Ocms. Put 6th h pair tubes from 
VIL+ VIR = 1°35 c.c. (30 m photon ‘0 ms. u 
[3-0-3°30 renal aneey. rate of flow = 159 c.c sia "30 minutes. | 
Nitrogen Strengths. 
hs an 
urine show clearly the effect of the prev 8. pressure—kidney cells, 
like other living tissues, one well the Hae a habet ( Adami) or law of inertia 
( an se 1896) —** tinue that once a cell is stimulated to perform a 
e he 
Sa has e in| operation ’’—a law which is quite oe 
able on the rer pet view of the mode of Sanativt: of the kidne 
EXPERIMENT 2 (for nitrogen strengths of paps Bg as with the 
1 milar 
ast experiment The results, as will be , the 
~_ difference Se that the maximum 40 ¢ P eianets "had 
re effect in increasing the quantity or urine ‘ciwate d. 
20 cms. urine (0°9 c.c. in 150 m.) = 0:000361 gm 
Ist 30 cms, urin - in 60 m.) 
Ist 40 cms. (1-2 ¢.c. in 30 m.) = 0000213 gm 
2nd 30 c¢ a ee ta n a oo 
2nd 20 cms. e2 pal ¢.c.in 60 m.) = 0:000280 gm. 
de zee fluid = 0-000233 gm. 

ie fi d other e to the above, sy cones 
in the fluid escaped v a the cut spohamice (the heart not bein, 
who and Page 0- a saline frsfine ater), 4 c.c. human urine being — a a 
2000 e.c he perfusion fluid, and obtained the same 
"t will Tnpenne one more experimen viata Aaentennal ae fact that 
ase of fluid pressure in the 
in the chloride 
strength of the ee excreted (thus havin’ ‘so opposite ‘effect to that just 
described for nitrogen 
Usiatibees 3 (for gs pestis ie of urine). Identical ila 
Experiment 2 usion fluid was the same, but I mu 
remark that, shiscahe labelled 0°6% saline, it was probably Heat 
to the salt being moist when weighed) of lower strength than 
