450 THE BEGINNINGS OF LIFE. 



(aggregated into flakes), and a great multitude of very 

 actively-moving particles. Some of them had a figure- 

 of-8 shape, and others were well -formed "Bacteria. 

 There were also a few monilated chains, as well as 

 simple unsegmented Leptothrtx filaments. The most 



FIG. 34. 



Bacteria, different kinds of Leptothrix, and green Organisms resembling 

 Desmids, from a Solution of Iron and Ammonic Citrate. ( X 800.) 



notable products, however, were a great number of single 

 and aggregated organisms, resembling certain simple 

 Desmids and Pediastre*. Like them, also, they exhi- 

 bited slow oscillations or partial slight rotations. Their 

 contents were decidedly greenish, though the hue was 

 not so bright as that of the organisms found in the last 

 solution. Some were single, and others were in groups 

 of four or eight \ 



Two drops of the solution, containing some of the 

 sediment, were placed in a clean animalcule-cage, 



1 The organisms in this solution more closely resembled those of 

 Experiment 2 (p. 365) than those of Experiments I and m. Bacteria were 

 contained in both, and the solutions themselves were also more similar 

 neither of them had become fluorescent. 



