I 1 8 BACTERIOLOGY. 



analysis to vary slightly, according to whether the 

 bacteria are in zooglcea or in the active state. In 

 the latter condition they are said to consist of 83*42 

 per cent, of water. In one hundred parts of the 

 dried constituents there are the following: 



A nitrogenous body . . . 84*20 



Fat . . . . . . 604 



Ash 4*72 



Undetermined substances . . 5*04 



This nitrogenous body is called Mycoprotein^ and 

 consists of 



Carbon . . . . . 52*32 



Hydrogen 7*55 



Nitrogen ..... H'75 



but no sulphur or phosphorus. 



The nitrogenous body appears to vary in different 

 species, for in Bacillus anthracis a substance has 

 been obtained which does not give the reactions 

 of mycoprotein, and, therefore, is distinguished as 

 anthraxprotein. 



Considering bacteria as cells, we may speak of 

 the cell-wall and the cell-contents. 



Cell-wall. The cell-wall consists of cellulose, 

 .or according to Nencki in the putrefactive bacteria 

 of mycoprotein. It may be demonstrated by the 

 action of iodine, which contracts the protoplasmic 

 contents, and renders the cell-wall visible. The 

 author has taken advantage of the action of iodine 

 to differentiate by staining the sheath of \\\e Bacillus 



