256 



BACTERIA IN THE SEA 



[part hi 



many are killed, but some can survive a temperature of about 

 twice that mentioned. The spores of bacteria can resist freezing, 

 drying, or temperatures which destroy the vegetative cells: 

 thus the spores of anthrax bacteria can withstand immersion in 

 boiling water for some time. A very great number of observations 



Sard n a n 



\\5 P' StabhylocGcci 



_:)warm Bacilli 





v 



.«i. 



^wTth 

 flaqella 



BacifTTwith 

 spores 



, ^Nitrosomonas 

 (nitnPyinc| coccusj 



Hal i bacteria(M i cros|:o 



/T, Ha[("bqcterla 

 ^Pnotobacillu-s-. or 

 Micros pora) 



'^ 



m^ 



_, Clostridium 



Azotobacter 



Fig. 31. Forms of bacteria. All are highly magnified, but the scale varies. 



have been accumulated with regard to the behaviour of bacteria 

 towards various nutrient materials, towards chemical] reagents, 

 towards the fluids of the body in normal and diseased states, and 

 with regard to their disease-producing effects; and pathologists 



