854 



N. F. GOLDSMITH, H. HUGGEL AND H. K. URY 



Changes in sérum magnésium, calcium, potassium and phosphate concen- 

 trations after four cardiac punctures are shown in Fig. 2 (expt. 3). Sérum magnesum 

 concentrations seemed to increase rectilinearly between 16 and 37 percent hem- 

 orrhage. Note that the cation increases were almost complète at 37 percent 

 hemorrhage, but phosphate relative to the other ions had a marked rise in the 

 last blood sample. In expt. 6 (3 punctures), phosphate increased 0.03 mEq/1 

 between 18 and 35 percent hemorrhage, 0.80 mEq/1 between 35 and 43 percent 

 hemorrhage. 



Per Cent Hemorrhage 

 Fig. 2. 



Changes in scrum magnésium o o, calcium o o, potassium A ■ A and 



phosphate o o, after four cardiac punctures. Bach point represents four to six analyses; 



vertical hais, t 1 SD. Expt. 3. 



