THE BEGINNINGS OF LIFE. 



453 



Experiment m. Some of the same solution as was 

 employed in the last experiment, similarly exposed 

 and rendered similarly fluorescent. After the exposure 

 to sunlight, however, the tube was kept in ordinary 

 daylight for two weeks, so that it was not opened till 

 the commencement of the ninth week. 



It was then found that the vacuum was impaired as 

 in the last experiment. On microscopical examination 

 of the sediment the same kind of granules (separate and 

 aggregated) were seen, and also great multitudes of the 

 Desmid-like organisms. These existed more abundantly 

 than in the last solution. Here also there was the 

 same fresh appearance of some, and faded look of others, 

 and also great variations in size the largest being 

 in length, whilst many were not more than 

 f " in length. Several groups of four were seen, in 



FIG. 35. 



Greenish, Desmid-like Organisms of different kinds, and Torul<r, found 

 in a fluorescent solution of Iron and Ammonic Citrate. ( x 800.) 



which the separate elements were spherical instead of 

 ovoid. There were also many straight, or slightly 



