553 



C. Galactose. 



Experiment 15 (July 18). 



The perfusion liquid contains 0,097o galactose. 



Reduction (0,1 c.c.) of solution passed 0,07'^/o. 



0,1 c.c. urine of right kidney: 0,35 c.c. Iodine solution; reduction 0,055"/,,. 



0,1 c.c. urine of left kidney: 0,33 c.c. Iodine solution; reduction 0,052%. 



Retained by right kidney : 0,07 - 0,055 = 0,0150,0. 



Retained by left kidney : 0,07— 0,052 = 0,0180/o. 



Experiment 16 (Aug. 22). 



The perfusion liquid contains 0,1% galactose. 



Redaction 0.1 c.c. of solution passed 0,07%. 



0,1 cc. urine of right kidney: 0,3 c.c. Iodine solution: reduction 0,045%. 



0,1 c.c. urine of left kidney: 0,28 c.c. Iodine solution; reduction 0,04%. 



Retained by right kidney: 0,07—0,045 = 0,025%. 



Retained by left kidney: 0,07-0,04 = 0,03'V,j. 



Experiment 17 (Aug. 28). 



Reduction 0,1 c.c. of perfusion liquid 0,055"/,,. 



0,1 c.c. urine of right kidney: 25 c.c Iodine solution; reduction 0,03250/,,. 



0,1 c.c. urine of left kidney : 0,15 c.c. Iodine solution ; reduction 0,0325"/o. 



Retained by each kidney 0,055—0,0325 = 0,0225%. 



Experiment 18 (Aug. 23). 



The same perfusion liquid as in experiment 17. 



0,1 c.c. urine of right kidney: 0,25 cc. Iodine solution; reduction 0,0325%. 



0,1 c.c. urine of left kidney: 0,25 c.c. Iodine solution; reduction 0,0325%. 



Retained by each kidney: 0,055-0,0325 == 0,0225'Vo- 



All these experiments show that the kidney retains a slight quantity 

 of galactose. 



We shall now record a few expei-iments with a perfusion liquid 

 the reduction of which approximalelj agrees with that of OA^i^ 

 glucose. 



Experiment 19 (Aug. 23). 



The perfusion liquid contains 0,15"/o galactose. ' 



Reduction 0,1 c.c. of perfusion liquid 0,0975%. 



0,1 c.c urine of right kidney : 0.4 c.c. Iodine solution ; reduction 0,07"/,,. 



0,1 c c. urine of left kidney: 0,4 c.c. Iodine solution; reduction 0,07%. 



Retained by each kidney: 0,0975-0,07 = 0,0275%. 



Experiment 20 (Aug. 23). 



The same perfusion liquid as in experiment 19. 



0,1 c.c. urine of right kidney: 0,33 cc Iodine solution; reduction 0,0526"/,,. 



0,1 c.c. urine of left kidney: 0,32 cc. Iodine solution; reduction 0,05"/o. 



Retained by right kidney : 0,0975—0,0525 = 0,045"/o. 



Retained by left kidney: 0,0975—0,05 = 0,0475%. 



Here again it becomes clear that some galactose is retained. In 

 the last experiment (20) the quantity is even comparatively large. 



