1. The series of Ryvosh is obtained when hemolysis of the red cells of the animals concerned occurs with saponin as the lytic agent.
2. The series of Ryvosh is not obtained when R∞ is taken as the resistance constant and sodium taurocholate is used to hemolyse the cells of the same animals.
3. The hemolysin sodium taurocholate has been found to differ from saponin in that the time-dilution curves are found to approach their respective asymptotes with different values of κ.