232 



GENERAL MICROBIOLOGY 



15. Examine gelatin plates after two days and then 

 every few days for seven days. 



([ i| r\ 



y 



J9M9S f 



16. Count before the liquefying organisms get so numer- 

 ous or large as to render counting difficult. 



17. Estimate the ratio of liquefying to non-liquefying 



