1910.| The Chenucal Dynanucs of Serum Reactions. 501 
YP = 3 85 Lex, (13): 
Consequently, { 
ih ee Lye, (14) 
fo) fe) 20 30 40 50 60 
The following experiment shows these facts very clearly. Normal human 
serum was made up in the following proportions :— 
| 
| Unheated serum. Heated serum. OIE ay 
parts. parts. 
PACS Le bes Meaee 4 e) 4 4 
1 Ee MARSA Ae 3 1 4, 3 
Ce ic taneen 2 2 4 2 
1S Gone serait 1 3 4 1 
eee scke: 1 7 8 aL 
Tubes were put up in two series. 
‘ C.C 
Series 1.—Serum mixture (A, B, C, D, or E) ............ 1:00 
O:8o-per-cent, NaCl solution .:.....--......+n. 0°95 
WiashGdetOnse COllSy rs. ico. s.ce er ccelecease das ccs 0:05 
Dhara). snkot tae eeceaare 2:00 
.. in this series amboceptor = 50 per cent. 
