xxxiv THE BEGINNINGS OF LIFE. 



No. XIV. Hay Infusion in forty-four hours showed a 

 very sHght amount of turbidity. In sixty-eight hours the 

 turbidity was most marked, and there was also a small 

 amount of sediment. In another twenty-four hours it was 

 noticed that the colour of the fluid had become much lighter, 

 whilst the turbidity and sediment had increased. It subse- 

 quently continued in much the same state, and the flask was 

 opened on the sixteenth day. The vacuum was found to be 

 almost wholly impaired, whilst the odour of the fluid was 

 sour, and not at all hay-like. On microscopical examination 

 Bacteria, Vib?'iones, Leptothrix, and Torulce. were found in 

 abundance, and the former were very active. 



No. XV. Turnip Infusion after forty-eight hours showed 

 a well-marked turbidity. In seventy-two hours the turbidity 

 was more marked, and there was a slight amount of sediment. 

 The turbidity also increased during t"he next twenty-four 

 hours; though, after that, the infusion seemed to undergo no 

 further change. The flask remained in the warm bath for 

 fifteen days, when the fluid was examined. Its odour was not 

 foetid, but was somewhat like that of baked turnip. Bacteria 

 and Vibrio7ies existed in abundance, though their movements 

 were extremely languid. 



Second Set of Experiments (XVI — XXI). 



b. Fluid in contact with Ordiftary Air and its Particles ; 

 Neck of Flask Sealed after the Fluid had become Cold. 



No. XVI. Simple Turnip Infusion in twenty-four 

 hours had undergone no apparent change. In thirty-six 

 hours there was slight turbidity, and in forty-eight hours this 

 was most marked and uniform. When the flask was opened, 

 after seventy- two hours, there was an outrush of very foetid 

 gas ; the reaction of the fluid was acid, and, when examined 



