BACTERIA 



form varies according to their state, thus a bac- 

 terium may be spherical when young and rod shaped 

 when older. Some bacteria are spherical and are 

 known as Cocci or Micrococci, from Greek words 

 meaning a berry or a little berry respectively; 

 sometimes these spherical bacteria occur in pairs, 

 then they are called Diplococci (double berries) ; or 

 in chains, Streptococci (chain berries) ; or in 

 bunches. Staphylococci (grape berries). They may 

 resemble short rods, when they are called Bacteria, 

 I name, by the way, which is also applied generally 

 :o all microbes ; they may, on the other hand, have 

 .:he appearance of longer rods and then they are 

 balled Bacilli, Some of these longer rods may be 

 s'.urved or even corkscrew shaped when they are 

 mown by the name of Spirilla. Rather fearsome 

 lames some of these we fear and we wished to 

 void long names, but they appear over and over 

 gain in books and papers relating to bacteria so 

 re are compelled to introduce them to our pages, 

 lany bacteria possess no power of movement, others 

 ivim rapidly, by the aid of the lashing movement 

 f little whip-like structures with which they are 

 Urnished. 

 . After all this preamble, which we hope has cleared 



IP certain misconceptions regarding bacteria and 

 is given the reader some insight into their habits, 

 e may proceed to the examination of some of the 

 Hants themselves. At the outset we have a con- 

 Jssion to make. Bacteria can only be studied 

 iriously, by those who possess very expensive and 



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