ECOLOf.ITAL SUCCESSION. I .} 



TABLT-: XV I. 



SHOWING CONTAMINATION OF POND sc AND ELEMENTARY FOOD SUBSTANCES ANP 



< \KIii>NAII-> IN Al.L. 



Single analysis, Oct. 26. 1909. 



'I In- chlorine content is regard I as a good index of the presence 



or .ili-fin i- nl sewage contamination, f\cn-i.i lu-in- hijji in 

 clilnriiif i iiinpiiiiixls. 49.7 part- pi-r million in pond 5. \\uiild 

 such contamination. I "mil \i\ iv.vntlv a h<m-e was 

 mi ilu- margin of pond 5*: tin- pond i- -lill -ulifct i 

 < ..iii.iinin.iiion l.\ domestic fowls. 



I ree .inniiniiia is tin- final sta^f in llx- l>ii.ikin- <l<>\\n \ 

 pn.ii-iiU .uxl .i|i|M.-ars also in animal excreta. It is used by plants 

 .ind f \ iili-nlK plants consume it in |m i|>rti<m to tlu-ir \ ulun 



\llniiix -imiil ainmontu prohabK n-pn -cut- mctalmluid- in -ulu- 

 li'Ui. because tin- \\atcr \\as filtered lHmf dfic nninatimi- were 

 m.xli . Sewage is rich in such compi.umU and -anii.ir\ analysts 

 ha\ i- I ui ml that the number of bacteria is closely correlated with 

 .mimim Hi albumenoid antmonia. 



; I'.aiii-ria. 1 >i . I'. G. Hfiiifiiiann and Mr- Class, "I the 

 I >f ILII l nn nl nl Bacteriology of the l'ni\er^it\ o|' ("hie.i-o. \<i\ 

 kindU made the counts of the bacteria. The re-nil- an- i;i\en 



in fable X\ II. 



XVII. 



I In- minil'i-i In ir !- n'i "i i ---I ii mil tn tin- .ill'iiini-ii' '!! .umih mi.i. hut iua> 

 partially accounted for by the fact that tin- Imttli- \\ li-ntally n|ii-in-,l m-.u 



llir -in i.i.-i- l in April J'i a oillrction at tin- -in I'.iri- nf tin- pii'l -lm\\i-i| 

 .it 



