ORIGIN OF LO WEST ORGANISMS. 8 1 



No- XXX VIL Turnip Infusion, *Neutralized by Am. 

 monic Carbonate in twenty-four hours was de- 

 cidedly turbid. In thirty-six hours the turbidity was 

 more marked, and there was a slight sediment. By 

 the end of forty-eight hours both turbidity and sedi- 

 ment had notably increased. On the fourth day, there 

 was a moderately clear fluid, containing an abundance 

 of curdy or flake-like masses. When the flask was 

 opened, these were found to be made up principally by 

 the aggregation of myriads of Bacteria. 



FIFTH SET OF EXPERIMENTS (XXXVIII. XLVIL). 



Fluids not boiled, but half-filling hermetically Sealed Flasks, 



containing Ordinary Air. 



No, XXXVIII. Turnip Infusion in ten hours showed a 

 slight amount of turbidity. After forty-eight hours this 

 was very well-marked : there was a thick pellicle on the 

 surface, and, in addition, a small amount of deposit. On 

 examination, the fluid and the pellicle were found to 

 contain an abundance of Bacteria, Vibriones and Lep- 

 tothrix filaments. 



No. XXXIX.-Turnip Infusion + ^ of Carbolic Acid 



after eight days showed no appreciable alteration in 

 appearance,| no trace of pellicle or deposit. When 

 examined microscopically, however, the fluid was found 

 to contain some very minute Bacteria, though they 

 were by no means abundant. 



No. XL. Hay Infusion had become quite turbid in 

 twenty-four hours, and several shades lighter in colour. 



* Some of same as that which was used (unaltered) in last 

 experiment. 



t It had been rendered turbid from the first, by the carbolic 

 acid. 



G 



