44 



Biochcmical AcHvity of Microorganisms 



[March, 



EXPLANATION OF PLATE i 



Fig. I. Solvent action of Strcptothrix on starch-agar. 



Fig. 2. Colony of Macrosporium solani on milk-agar. 



Fig. 3. Large colony of B. nicgathcrium on milk-agar. 



Fig. 4. Action of M. citricus on milk-agar. 



Fig. 5. Solvent action of Sarcina lutea on egg-all)umen-agar. This print 

 was made by placing the Petri dish on the Photographie paper and illuminating 

 it for the proper time. 



Fig. 6. Solvent action of Bact. lactis acidi on calcium carbonate suspended 



in the agar. 



