EQUILIBRIA IN ABSORPTION PROCESSES 



159 



The salts of (univalent) mercury and silver differ rather 

 widely from those of other univalent ions. Probably they 

 form nearly insoluble chemical compounds with the 

 albuminous matter. 



In other experiments Bechhold investigated the retard- 

 ing influence of small additions of gelatin, serum, gum 

 arabic, extract of typhoid bacilli or of leeches on mastic 

 emulsion. Gelatin did not exert such an influence on 

 normal bacilli, sero-bacilli, or lead bacilli. The alcohol, 

 acid, or uranyl bacilli display properties lying between 

 those of normal bacilli and of sero-bacilli, but their aggluti- 

 nation was lowered by the addition of gelatin. Probably 

 the addition of gelatin or serum covers the suspended par- 



