76 ORIGIN OF LOWEST ORGANISMS. 



though there was a slight flocculent deposit of an uncer- 

 tain nature. Two days afterwards the flask was broken, 

 when the odour of the fluid was still found to resemble 

 that of fresh urine, and its re-action was acid. The 

 flocculi were made up of granular aggregations, in the 

 midst of which were a few bodies closely resembling 

 Torul<z, though they were somewhat doubtful in nature. 

 Neither Bacteria nor Vibriones could be found. The 

 flask, having a short open neck, was then replaced in 

 the warm bath. In sixteen hours the whole fluid had 

 become turbid ; it was also slightly fcetid ; and on 

 microscopical examination it was found to be swarming 

 with Bacteria, Vibriones, and Leptothrix. 



No. XXV. Turnip Infusion -f- \ gr. of Cheese in forty- 

 eight hours showed no change, though in seventy-two 

 hours there was a well-marked pellicle, in which 

 some bubbles of gas were engaged. After ninety-six 

 hours the neck of the flask was broken ; the fluid was 

 found to be fcetid, and it had an acid re-action. On 

 microscopical examination, a portion of the pellicle was 

 seen to consist of multitudes of Bacteria, Vibriones, and 

 jointed Leptothrix filaments. 



No. XXVI. Simple Turnip Infusion remained clear, 

 and showed no appreciable change for seven days. On 

 the eighth day a slight general turbidity of the fluid was 

 noticed. On the ninth, the turbidity was rather more 

 marked, though there was no trace of a pellicle ; the neck 

 of the flask having been broken, the fluid was found to 

 be odourless and very faintly acid. On microscopical ex- 

 amination, multitudes of languid Bacteria of medium 

 size were found, and also short monilated chains with 



