PLANT BACTERIA. VOL. 3. 



PLATE 11B. 



(l) Photographs of Petri-dish poured plater showing behavior of Aptandkacla ratkayi In +15 peptonized beef agar. A. plate 

 own heavily growth ilow in developing but finally good; B, plate sown thinly growth retarded; C. plate sown more 

 thinly growth still more retarded; I), plate sown still more thinly, but with quite a good many bacteria no growth. Plate* 1 8 



(j) P 



. 



.. , Portion of an afar poured plate, showing 



at B a buried colony of the white organism frequently associated with ApUnnbacler ratkayi. in which (but nowhere die on the 



, 



days old at room temperature (15 C.*). Growth visible on A alter about 9 days, 

 at B a buried colony of the white organism frequently associated with ApUnnbacle . 



plate) are growing the small yellow (black in photo) colonies of A p. ratkayi. which was sown copiously. Time 34 days. (j) Like 

 i. bat from another sowing: B. A buried white colony containing the yellow (white in photo) colonies of A ftanokaitrr ratkayi; S. S. 

 two surface colonies of the white schizomycete in which no yellow colonies were visible. The plate was sown heavily with the 

 yellow organism, but none developed, except in the body of the buried white colonies. Time 26 days. 



