Agglutination Tent in Abort i 



381 



Note on liendinds. 



"Agglutination " is to be interpreted as a definite macroscopic 

 aggregation of organisms into clumps deposited eithei- at bottom 

 of tube or at bottom and along sides of tubes. 



" Clearing," where the supernatant fluid is free, to the naked 

 •eye, of suspended organisms — i.e., agglutination and sedimenta- 

 tion. 



" Slight," wliere there is a trace of agglutination deposit — not 

 Avhat one might Avith confidence call a definite agglutination. These 

 " slights " are read as ncijative agglutinations, in considering the 

 agglutination titre of a serum. 



Set I. 



Amount of Seniir 



0.02 c.c. 

 0.012 c.c. 

 0.01 c.c. 

 0.008 c.c. 

 0.006 c.c. 

 0.0056 c.c. 

 0.005 c.c. 

 0.004 c.c. 

 0.003 c.c. 

 0.0025 c.c. 



TABLE I. 



Dilution. 

 1 in 50 

 75 

 100 

 125 

 150 

 175 

 200 

 250 

 300 

 400 



+ + Siy:nifies agglutination and clearing. 



+ Signifies agglutination. 



S Signifies slight agglutination. 



— Signifies no agglutination. 



