THE PKESENCE, TYPE, AND POSSIBLE SIGNIFICANCE OF LACTOSE-FEKMENTING BACILLI 331 



Additional Experiment s — continued 

 B. Samples taken from a trench 7 ilai/a old 



Group I, 3 fTroup II, 3 Group III, 4 Group IV, nil 



G. Samples taken from a trench 14 days old 



Group I, 2 Group II, 3 Group III, 4 Group IV, 1 



" Aliout all these there is a certain amount of doulit 



