14 BACTERIOLOGY FOR NURSES 



Water 85.45% 



Proteins 10.33% 



Fatty substances .... .7% 



Ash . 1.75% 



Residue 1.57+% 



Sulphur, potassium, calcium, magnesium, phos- 

 phoric acid, iron, and silica are found in varying 

 amounts. 



Cellulose, the predominant element in the higher 

 forms of plants, is absent from bacteria, and the 

 nature of the protein substances of bacteria are 

 little understood. 



