The call for oxygen considered as a physiological test 113 



of the gelatine though corresponding to the slightly lower osmotic 

 pressure ; there was just a little greater diuresis than in the case of 

 the starch, though still the diuresis was but small as compared with 

 that of the Ringer's solution which contained no gum acacia. 



*. 



3 

 cc. 



2 - 



cc 



cc 



III 10 



GUM cl IMF 



ACACIA S * LINE 



II.3O 



1 2.. 00 



GUM 

 ACACIA 



SALINE 



SULPHATE 



GELATINE 

 SULPHATE 



SULPHATE 



FIG. 07. Urine and blood-pressure plotted 

 as in Fig. 66. 



F IG . 68. Urine, blood-pressure and 

 blood-flow through the kidney 

 plotted as in Fig. 66. 



The following are the data of the osmotic pressure : 



Solution Temp. 



5 / gelatine in normal saline 37 C. 



5 / gum acacia in normal saline 37 C. 



3 / soluble starch in normal saline 37 C. 



Osmotic pressure 

 of colloid 



23 mm. Hg 



12 mm. Hg 



2 mm. Hg 



These figures for gelatine and for gum acacia are considerably 

 lower than the figures given by Moore and Roaf. This is to be 

 explained in part by the fact that they were dissolved in Ringer's 

 solution instead of distilled water and thus the "solution aggregates" 

 of the colloids were altered. 



B. K. F. 8 



