14 



Bacteria in Relation to Country Life 



The spherical forms (Fig. 4) differ from the others in 

 multiplying in two or even three planes; hence they 

 may be observed, not only in chains of two or more, but 

 in square or cubical packages, the latter appearing liko 



-' 



Fig. 5= Rod-shaped bacteria. 1. Bacterium panis; X 1,000. (Fuhrmann.) 

 2. Bacillus oxalaticus: X 1,300. (Kuntze.) 3 . Bacillus solanisaprus; X 1,500 

 (Harrison.) 4. Bacillus casei; X 1,400. (Freudenreich.) 5. Bacillus 

 mycoides; X 1,000. (Nadson.) 6. Pseudomonas trifolii; about X 1,500. 

 (Huss.) 7. Pseudomonas dermatogenes; X 1,000. (Fuhrmann.) 8 Bacil- 

 lus cerevisice; X 1,000. (Fuhrmann.) 9. Clostridium Pastorianum. 

 (Winogradski.) 



small bales composed of balls. It has been aptly said 

 that bacteria may be considered immortal, since the 

 same cell may go on multiplying indefinitely. After 

 division, two organisms do not always separate, but 



