The authors have experimentally verified the theoretically deduced relation for the concentration of bacteria in the individual vessels of a multistage continuous system arranged so as to enable—at suitably chosen retention times in the individual vessels—the study of even rapidly occuring changes in the bacterial culture. Moreover, such system permits to compare the development of the batch and continuous culture. It has been demonstrated that according to the chosen retention times any section of the growth curve, the individual phases of which are spacially separated in the individual vessels can be reproduced in the continuous system.