REVIEW. 



made ? Mention other discoveries made by one 

 of these men? Which is considered to be the 

 most important of his discoveries and why? 



XI. — Name some of the important dis- 

 coveries made during later years and their dis- 

 coverers. 



XII. — Mention some diseases now consid- 

 ered to be caused by bacteria and explain why 

 the germs discovered in one or two instances 

 have not been accepted as the originators of 

 the trouble. 



37 



