BY H. G. CHAPMAN. 



535 



A series of experiments illustrative of the action between 

 fowl's egg-white and fowl's egg-antiserum may now be described. 

 The rabbit was immunised by the injection of 6-48 gm. dried egg- 

 white in six doses. The antiserum was dried. Egg-white was 

 diluted with saline solution to facilitate measurement. The solid 

 content of the egg-white was determined by drying in vacuo over 

 calcium chloride to constant weight. All the primary tubes 

 were made up to 2-6 c.c. with 0-75% sodium chloride solution 

 Table iv, records the primary interactions. 



After 48 hours the superfluid above each precipitate was 

 removed and filtered. The removed fluid was divided into three 

 portions of 5 c.c. each, A, B, and C. To each tube of series A, 

 0-1 c.c. of 1 % egg-white in saline solution (0-00012) was added. 

 To each tube of series B, O'Ol gm. dried antiserum dissolved in 



Table v. 



0-1 c.c. saline solution was added. The tubes of series C formed 

 controls. After 48 hours, readings were taken, and these are 

 recorded in Table v. 



