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306 



THE BEGINNINGS OF LIFE. 



And whilst collateral evidence of all kinds points to the 

 conclusion that the presence of these Ciliated Infusoria 

 in various infusions is explicable only on the supposi- 

 tion that they have been derived from the ^pellicles' 

 which form upon such infusions^ every stage of their 



may also be watched with the 

 greatest ease by the microscopist. 



heterogenetic origin 



y' 



Thus although evidence of the most varied and 

 conclusive nature concurs in attesting the frequency 

 with which processes of Archebiosis and Heterogenesis 



+ 



occur, no facts are favourable to the mere assumptions 

 of the Panspermatists, whilst the hypothesis upon which 

 they rely is cumbersome, unwieldy, and now utterly 

 unnecessary. 



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