-J' 



THE 



EXPLANATION 



/ 



Important con side 

 are unable to 

 Air. Experir 

 Theory, Val 

 Fermentation 

 Degrees of Fi 

 Their Subsidi 



periments ^Yit 

 and Archebic 



Formation of Spei 

 cules to ' ph 

 Chemical Aff 



^f ' natural a 

 not-living to 



Influence of ] 

 •^^^nges in ij 



^"§ination a 

 l^^^ from cr 



^y^amic Ag 



