LIGHT PRODUCTION BY LUMINOUS BACTERIA. 



TABLE IV. 



EFFECT OF ALCOHOLS. 



1 Probably due to evaporation of alcohol. 



the light was found to disappear almost immediately; with 

 tannin, chloral hydrate, vanillin and sodium glycocholate the 

 light had disappeared in the course of one hour while saponine, 

 amygdalin, and sodium taurocholate had no effect. It is sur- 

 prising that saponin has no effect on luminous bacteria when we 

 consider its great cytolytic power 'on other forms in very small 

 concentration. 



SUMMARY. 



The effects on luminous bacteria of dilution of sea water with 

 water and m sugar solution; of HC1 and valerianic acid; of NaOH 

 and methyl amine; of the salts of sea water in different combina- 

 tions; and of methyl, ethyl, propyl, butyl, amyl and capryl 

 alcohol were studied. The points of interest in the results are 

 indicated after each table. 



