5 8 LABORATORY GUIDE IN BACTERIOLOGY 



Approximate number. 



Shape: punctiform, lanceolate, oval, cir- 

 cular, spindle-shaped, conglomerate, 

 irregular, branched, filamentous, rosette- 

 shaped. 



Color in transmitted and reflected light. 



Approximate diameter in millimeters. 



Elevation (and shape of elevation) or 

 depression. 



Translucency. 



Moist appearance. 



Smoothness. 



Luster. 



Liquefaction (in gelatin plates only). 



Consistency: soft, viscid, hard, chalky. 

 b) Deep colonies. 



Color. 



Shape. 



2. Microscopic appearance under low power (No. 

 3 objective). Care must be taken to use very 

 little light, the diaphragm should be almost 

 closed. 

 a) Surface-colonies. 



Shape. 



Color. 



Translucency. 



Thickness (in center and edges). 



Nucleation. 



Striation. 



Granulation (if present, whether coarse or 

 fine). 



Homogeneity. 



