CHAPTER II. 



Revelations 

 of the 

 Microscope. 



Cell 

 Formation. 



Organs and 

 Systems. 



THE RELATION OF BACTERIA TO DISEASE- 

 TERIA IN PROCESSES OF NATURE. 



-BAC- 



Mysteries concerning the origin of numerous 

 diseases, which must otherwise have remained 

 mysteries forever, have been made more or less 

 clear since the perfecting of the microscope 

 Prior to the revelations made by the use of this 

 instrument, very little was positively known 

 fconcerning the formation of the various ele- 

 ments of which the machinery of the human 

 structure is made up and by which it is kepi 

 in running order. Now scientists are able to 

 trace the human body back to the time when it 

 was but a single cell, from this single cell tc 

 watch its growth and development into in- 

 numerable single cells, to see the single cells 

 fold into layers, these in their turn to form the 

 groups of cells out of which the various bones 

 and muscles and nerves and tubes and tissues 

 of the body are composed. These groups we 

 call the organs and systems of the body. Each 

 has its own work to perform, and each exists 

 to a certain extent independently of the other, 

 Yet all are so intimately related and connected 

 in their efforts to maintain life and health thai 

 when disease comes to one group of cells com 

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