Wassermann Reaction. 



19 



technic used in this laboratory 1 , from 2 to 6, generally around 3.5. 



In order to calculate the constants of the above equation from 

 numerical data, I have devised the nomogram illustrated in Fig. 1. 

 This enables the value of n to be directly ascertained from any 

 pair of values of x and y, (xi, y u ) and (x 2} yz), where as before x is 



Fig. 2. Coordinate paper — log y/(i — y) vs. log x. 



1 Morse, Psychiatric Bulletin, 1916, i, 47. 



