GROWTH ON DIFFERENT CULTURE MEDIA 203 



the organisms lose their motihty. Non-motile facultative 

 anaerobes usually cloud the broth also, but settle out more 

 rapidly than the motile ones. 



Fig. 146 Fig. 147 Fig. 148 Fig. 149 



Fig. 146. — Crateriform liquefaction of gelatin. X J. 

 Fig. 147. — Funnelform liquefaction of gelatin. X J. 



Fig. 148. — Saccate 'liquefaction of gelatin. X i. 



Fig. 149. — Stratiform liquefaction of gelatin. X i- 



In gelatin and agar punctures the oxygen relationship is 

 shown by surface growth for aerobes, growth near the 

 bottom of the puncture for anaerobes, and a fairly uniform 

 growth all along the line of inoculation for facultative 



