Paul E. Howe i6i 



TABLE 2 



Comparative data pertaining to the weights of AIPO^, in milligrams, obtained 

 upon analysis of pure Solutions of AL(SOi)s 



A. O. A. C. (Steel) Method Schmidt-Hoagland Method 



Found Theoretical Found Theoretical 



Milligrams Milligrams Milligrams Milligrams 



13-0 1 13.0 



''■^ l 13.0 ''-^ 



^2.7 j •" 13.0 



12.8 J 13.2 J 



13.0 



AlUMINUM SULFATE AND FERRIC CHLORID. AnalySCS of miX- 



tures of aluminum sulfate and ferric chlorid in dist. water gave the 

 results in Table 3 : 



TABLE 3* 



Comparative data pertaining to the weights of AIPO*, in milligrams, obtained 

 upon analysis of pure Solutions of AL(S0i)3 and FeJCk 



* In one set of determinations by the Schmidt-Hoagland method, the am- 

 monium acetate added was not sufficient to reduce the acidity to the point where 

 the aluminum would precipitate. In these cases the ignited residues obtained 

 were equal to those found in the blank determinations reported above. 



Analysis of blood. Dog blood. Two dogs were bled com- 

 pletely, under local cocain anesthesia. The blood was drawn, ac- 

 cording to the procedure of Steel, into weighed flasks. Five gm. 

 of ammonium Oxalate were placed in the bottom of each flask to 

 prevent the clotting of the blood. To one sample a weighed por- 

 tion of the Standard aluminum sulfate sol. was added, the other 

 portion was analyzed as such. The digestion was carried out with 

 nitric and sulfuric acids. It was found more convenient to add the 

 blood to the hot nitric acid in small portions, heating after each 

 addition until the liquid was clear, than to add the nitric acid to the 

 total quantity of blood as proposed by Steel. The analytic results 

 in Table 4 were obtained. 



