52 BACTERIOLOGY. 



position of bacteria in great detail. As the result of 

 his studies of microspira comma, he found its composi- 

 tion to be as follows : water 88.3 per cent., albumin 7.6 

 per cent., ash 3.6 per cent. The dry substance of the 

 bacteria contains the following : albumin 65 per cent., 

 ash 31 per cent.. From 76 to 80 per cent, of the ash 

 consists of sodium chloride and phosphate. 



For the purposes of this book it will suffice to 

 classify the bacteria roughly into three morphological 

 groups with their subdivisions, the members of each 

 group being identified by their individual outline, viz., 

 that of a sphere, a rod, or a spiral. To these three 

 grand divisions are given the names cocci or micrococci, 

 bacilli, and spirilla. 



FIG. 2. 



00 

 00 ft 



rf * * 



u> tf> <? 



c d e 



a. Staphylococci. 6. Streptococci, c. Diplococci. d. Tetrads, e. Sarcinse. 



MODE OF MULTIPLICATION. In the group micro- 

 Good belong all spherical forms i. e., all those forms 

 the isolated individual members of which are practically 

 of the same diameter in all directions. (See Fig. 2, a, 

 6, c, d, e.) 



