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A TEXT-BOOK OF BOTANY 



Reproduction is by cell-division, as among the blue- 

 green Algae ( 58-60), a group which the bacteria resemble 



FIG. 121. A group of bacteria of various kinds, mostly ciliated; F is the bac- 

 terium of typhoid fever, and H that of cholera. After ENGLER and PRANTL. 



in many ways. This cell-division is remarkably rapid in 

 bacteria, resulting in such a prodigious multiplication of in- 



