~^. 



'■ sedim 



tive 



% i 



) ^df. 



'^oveine,,, ' 



Th 



ere 





^i^st of wt, 





\ 



iple Solution of 

 8co,) 



:ells of differfflt 

 dth a segw»' 



half contaiDf' 

 hadau 



neous 



CO 



;> 



or niof^' 

 few 



am 



tha 



,Ifa 

 tically 



as 110 p° 



> » 



scaled' 



a 





r^^ BEGINNINGS OF LIFE. 



365 



deposit began to collect at the bottom of the flask, 

 which slowly increased in quantity. 



On opening the flask the reaction of the fluid was 

 found to be still slightly acidj and on microscopical 

 examination of the deposit several different kinds of 

 organisms were discovered in and amongst the granular 

 aggregations of which it was in great part composed. 



Many 



of deal wood — dotted ducts. 



gcc— were also intermixed. 



Amongst the organisms were perfectly-formed Bacteria, 

 about ^Jq-" in length, which were very numerous and 

 extremely active ^ several long unsegmented Lepothrix 

 filaments, 



2 5000 



' in diameter j many oat-shaped Torula 

 corpuscles, about 5 oVo" in length j three or four spherical 



\ 



Fig. 26. . 

 Bacteria, Leptothrix, Torulce, and other organisms found in a Solution of 

 Ferric and Amnionic Citrate, plus some minute fragments of deal 

 wood, (x 800.) 



or ovoid fungus-spores^ each having a large central 



nucleus, and others rather smaller, having granules 



within instead of a distinct nucleus; also, partly 

 imbedded in one of the granular aggregations was a 



