REVIEW. 



Errors of some of the early students of bac- 

 teriology. 



Slow progress in discovering a special germ 

 for each infectious disease. 



Men who are considered to have made the 

 most valuable contributions to bacteriology and 

 their discoveries. 



QUESTIONS FOR REVIEW. 



I. — Who perfected the "single lens" and 

 what were the first discoveries made by its per- 

 fector? In what year did he announce his 

 discoveries? Are these the earliest discoveries 

 of which we have any account? 



II. — In what year were later discoveries an- 

 nounced by this scientist? How were these 

 discoveries made ? To whom were the results 

 of his researches presented ? 



Ill.-^What attempts were made to classify, 

 separate and identify the germs discovered, and 

 were they believed to be in any way connected 

 with pathological changes in any particular part 

 of the body? 



IV. — Who was the first physician to ascribe 

 to micro-organisms the power to produce the 

 so-called infectious diseases? In what year 

 was the announcement made ? Was the theory 

 accepted ? 



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