258 



CRYPTOGAMS 



Agar, 5 g. 

 Beef extract, 5 g. 

 Peptone, 5 g. 

 Common salt, 5 g. 

 Water, 500 cc. 



Directions. Dissolve the beef, peptone, and salt in 

 water and neutralize with sodium carbonate if necessary. 



FIG. 114. Bacteria, a, from drinking cup; b, from lunch room; c, from 

 schoolroom ; d, on hairs. 



