AND THE CAUSES OF FERMENTATION. 129 
atmospheric particles of all kinds? They can only 
have arisen’ by the process which I have termed 
Archebiosis. 
Conclusions.. 
If a previously boiled ammonic-tartrate solution 
remains free from Bacteria and Vzbriones when ex- 
posed to the air, it is because the air does not contain 
living organisms of this kind or their supposed 
‘germs,’ and’ because mere dead: organic particles are 
not capable of initiating Putrefaction in such a fluid. 
‘And if ordinary organic infusions previously boiled 
and exposed to the air do rapidly putrefy though 
some of the same infusions when exposed only to 
filtered air remain pure, it is because such fluids are 
in the absence of living units, quite amenable to the 
influence of the dead organic particles which the air 
so abundantly contains, although they are not self- 
Sh 
fermentable. 
Whilst if other more changeable fluids, after 
previous boiling, when exposed to filtered air or cut 
off altogether from contact with air, do nevertheless 
undergo Putrefaction or Fermentation, it is because 
these fluids are self-fermentable, and need neither 
living units nor dead organic particles to initiate 
those putrefactive or fermentative changes which lead 
to the evolution of living organisms. 
K 
