"S.3 

 i.M 



fll 



TEST. 



Tube containing the serum to be tested. 



CONTROL. 

 Control of serum to be 



ested to deter- 



mine substances which without antigen 

 may inhibit hemolysis. g. 



IJS, 



girt 



^ CONTROL. 



< "2. |^ Control of the test by the use of a known 

 ~ S' ' syphilitic serum. 



CONTROL. 



Control of the known positive to deter- 

 mine that it contains no recently developed 

 . . -T* 1 substances that may inhibit hemolysis. 



CONTROL. 



Control of the test by the use of a known 

 norma serum. 



- 



a 



CONTROL. 



3 Control of the known normal serum to de- 

 3 termine that no substances inhibiting hemo- 

 H lysis had developed in it. 



I 



a : 



the first part of 

 n the thermosta 



1> ^ 



2t 



n 



CONTROL. 



Control test to determine changes in the 

 ?T antigen by which hemolysis might be pre- 

 ^" vented. 



CONTROL. 

 Control of the hemolytic system. 



* 



CONTROL. n 



Control for the purpose of determining 

 the presence of anti-sheep amboceptors in 

 the serum to be tested. 



331 



