BACTERIOLOGY IN A NUTSHELL. 



naked eye and of their power to produce dis- 

 eases. 



The perfection of the single lens. Nation- 

 ality of the perfector. Discoveries of this 

 scientist during the seventeenth century under 

 the single lens and by means of the compound 

 microscope. The presentation of the results 

 of his researches together with appropriate en- 

 gravings to the Royal Society of London, 

 England, of which society he was afterward 

 Fellow. 



Power to produce the so-called infectious 

 diseases ascribed to micro-organisms by a 

 scientist of Vienna. Theories advanced by this 

 scientist. Non-acceptance of his theories: 



The germ theory of disease again advanced 

 about sixty years later and its successful demon- 

 stration. 



A short account of one of the subjects which 

 caused much discussion during the century and 

 a half between the discoveries of the Hollander 

 and the acceptance of the theory of the scientist 

 of Vienna. 



The man who first threw light upon the 

 mystery surrounding this vexed question and 

 the manner in ^ which he carried on his experi- 

 ments. Work and its results along the same 

 lines by other scientific men of that period. 



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