168 Journal of the Asiatic Society of Bengal. [N.S., XVIII, 
the K, Fe (ON), , and KI, increasing with the premeirar of the 
— oo sapceneet fluid, thus contrasting with perfusion via 
the 
APPENDIX C. 
= Increase of Osmotic Pressure in the Renal Afferent Vein Fluid 
auses Increased Flow of the Arterial et — lta bs 
increased Rate of Urine Excr 
18 I have stated that the substitution of fluids of increased osm 
tic preavure in n the renal afferent veins accelerates the flow of the actaeta 
id in the intertubular plexus and therefore the production of urine, pro” 
iti mit. i e 
viding that other conditions per e as well if I now addue 
ome concrete evi e in sup this assertion. ‘T perime 
referred to on page 83 in eterna of the fact that even when solutions 
of K,Fe(CN), and urea three times as stron ng in these eoggetege 9 as the 
sets fluid are perfused through ‘at renal afferent veins, no diffusion or 
esmosis of these substan occu fford some of the svedence now 
re I 
s rs, @ 
quired. I will describe the one which I first sect ae 
ExrERiMEent |. In this experiment + made three perfusion fluids, 
each consisting of 0:6% saline (N fdw), and with the following 
unts © ea 
amounts of zane ferrocyanide dissolved respectively in 
2000 c 
30 fluid. 1 gm. urea pe - nt = i Fs Ye 
60 fluid. : — »» and 0°2500 g 
90 fluid. ms, 3: aioe 3750 ee! 
The 30 ace was perfused through sin aorta throughout the ex- 
periment and at first through the two r.a.v. also Bc, — followed 
by the 60 and 90 fluids thiech apg hee already 
stated in the text, the four samples of urine esha in this 
experiment were indentical in rose 2a and ferrocyanide 
strength,  tibcehe rer set going at 9:1 
30 fluid 9°40-10°10 T.a.v. bottles 1°85 c.c. urine 
at6e in 3 St vaannten. 
wae Lente 483 c.c. 
lk Cc.ec. 
r ad. = 110 c.c. 
=49: 1 flows. 
60 fluid 10°40-11-10 r.a.v. bottles 2°0 c.c. urine 
at 10 ems. in 30 minutes. 
— ported 565 c.c. 
i 
Ped Ud Bi 
A a vie ae 117 c. ec. 
=48: 1 flows. 
5 ee 11°15-11-45 r.a.v. bottles 2-0 c.c. urine 
at 12 cms. in 30 minutes. 
pipe 8 salsa = C.c. 
i, 
3: G.c, 
S . eae Hl ¢.c. 
oe 4 flows. 
90 fluid 12-15-12°45 r.a.v. bottles = 1 c.c, urine 
at 12 cms. n 30 minutes. 
aorta perfused 570 c.c 
1. £.8.¥. C0, 





