238 
each time with an interval of one week. After the addition of '/, 
percent phenol the solutions were kept in the icebox. 
A week after the last injection the hemolytic action of these sera 
on sheep-blood was examined. 
The technique used in these experiments and the indication of 
the results are the same as in the former communication (m. tr. = 
== minim trace). In the table given below the results of hemolysis . 
are indicated. 
Injection of 
heen I | Il | Il IV | Vv 
0/0 mtr 0 Gc tr. ANC: 
0 a | fs 
0/0 
a 7 mn tr 
The experiments will be published extensively elsewhere. 
The results obtained encourage further research on the possibility 
of obtaining antigenic actions by combining various non antigenic 
substances with proteins. 
