496 
Captain A. G. McKendrick., [ Nov. 30, 
The results of this experiment are shown in Chart 1, where points— 
Marked C indicate complete lysis. 
3) 
WAR 
It is particularly to be noticed that the curves are thrown back (towards 
the right) in their upper parts. 
9) 
29 
2) 
2) 
nearly complete lysis. 
partial lysis, 
sight ,, 
a trace of lysis. 
z= 0°54 
Letters referto 
observed results. 
The curves are 
calculated. 
This exhibits the special phenomenon 
(already referred to) called “ complement diversion.” As the curves appeared 
to form a regular series, I considered that the principle lying at the root of 
serum reactions was to be found in this phenomenon. 
Assuming the curves to be hyperbolic from their appearance when z was 
constant, I looked for the asymptotes. One asymptote ‘was obviously 
y= 0; another suggests itself as of the form x/z—y = 0; for, letting z 
