673 



concentration. We hare namely made the titration-alkaUnity of our 

 transmission fluid equal 'to that of frog's serum. 



TABLE III. 

 Effect of an increased NaHCO^-concentration. 

 Transmission Jrom the aorta of NaCi 0,6 o o, NaHCOa 0,090 o o, 

 KCl 0,010 Oq and CaClg • 6 aq. 0,020 o o_0,050 O/o; colour of transmission- 

 fluid orange-yellow caused by neutral red. 

 (Experiments of June— July 1917). 



For this purpose frog's serum was titrated with \/,. normal' tar- 

 taric acid with neuti-alred paper as an indicator, according to the 

 method of Snapper '). 1 cc. of defibrinated only slightly haemoljtic 



') For the meaning of this column see p. 677. 



*) J. Snappee: Biochemische Zeitschrift 51, (1913), 88. 



