EXERCISE LX. VARIETY OF PIGMENTS. 
Make agar or potato streak cultures of the following organisms, incubate at 28°C., study, describe and sketch. 
AGAR STREAK. 24 Hours. : 48 Hours. SKETCHES. 
Bacillus 
indicus 
or 
Sarcina 
aurantiaca 
or 
Sarcina 
lutea 
or 
Pseudomonas 
fluorescens 
(B. fluorescens) 
or 
Pseudomonas 
aeruginosa 
{B. pyocyaneus) 
or 
Pseudomonas 
violacea 
or 
a 
[66] 
