THE MULTIPLICATION OF MICRO-ORGANISMS 225 



The results obtained with different waters have 

 been graphically brought together by Miquel in the 

 following diagrams, in which the abscissae represent 

 the duration of time, and the ordinates the number of 



200,000 



100,000 



Days. 



FIG. 1(). MULTIPLICATION OF BACTERIA IN SPRING WATERS. 

 (Miquel.) 



bacteria present in 1 c.c. All the samples were main- 

 tained at from 29 to 30 C. 



The above figure represents the behaviour of certain 

 spring-waters containing initially only a small number 



Q 



