448 THE BEGINNINGS OF LIFE. 



also met with, singly and in groups ; and in addition, 

 a thick-walled body with granular contents, j-f- ^" in 

 diameter. No distinct Bacteria were seen, though there 

 were numerous acicular crystals, some solitary, and 

 others in peculiar bundles having constrictions at in- 

 tervals. A number of minute octohedral and prismatic 

 crystals were also present 1 . 



Experiment h. A solution containing seven grains 

 of iron and ammonic citrate (mixed with a few very 

 minute fibres of deal wood), seven grains of ammonic 

 tartrate, and three grains of sodic phosphate, to one 

 ounce of distilled water. 



When taken from the digester this solution was 

 found to have become fluorescent being blackish by 

 reflected, and olive-green in colour by transmitted light. 

 After a time, some cloud-like flakes appeared, and also 

 an increasing quantity of sediment. After eight months, 



FIG. 33- 



Bright green Organisms resembling Pediastrea, from a Solution con- 

 taining Iron and Ammonic Citrate and other ingredients. ( X 800.) 



the vacuum being still well preserved, the neck of the 

 flask was broken and its contents examined micro- 



1 Only three drops of the fluid were examined. 



