CHAPTER XX 



THE END OF THE STORY 



SO important is the subject of the causation 

 of disease by these minute organisms, 

 and so full is this field of the promise of 

 practical and far-reaching benefit to man, that 

 large numbers of scientific workers all over the 

 civilized world are eagerly and patiently de- 

 voting their time and skill to the study of 

 bacteria. 



Great care and technical facility are re- 

 quired to carry on successfully this kind of 

 investigation, and it is not at all surprising, 

 since we have known how to study bacteria for 

 but a short time, that we should as yet know 

 very little about many of the bacterial dis- 

 eases, or that we should often be mistaken 

 in our interpretations of what we do know. 



There is the greatest temptation for workers 

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