278 



STUDIES ON BIOLUMINESCENCE. IX 



TABLE II. 



Properties of Photogenic Substances. 



Property. 



Saturation NaCl 



Half saturation MgS04 

 Saturation MgS04 



Salting 

 out by 



" " + acetic acid. 



Half saturation (NH4)2S04 



Saturation (NH4)2S04 



" " + acetic acid.. 



Solubility 



Methyl alcohol 



Ethyl " 



" " 90 per cent. 



" " 70 " " . 



" " 50 " " . 



Propyl " 



Isobutyl " 



Amyl " 



Benzyl " 



Acetone 



" 90 per cent 



" 70 " " 



" 50 " " 



Ethyl acetate 



" propionate 



" butyrate 



" valerate 



" nitrate 



Glycerol 



Glycol 



Ether 



Chloroform 



Carbon disulfide 



" tetrachloride. 



Benzene 



Toluene 



Xylene 



Petroleum ether , 



Aniline 



Glacial acetic acid. . . , 



Luciferase. 



Not precipitated. 



Nearly completely 

 precipitated. 



Slightly precipi- 

 tated. 



Completely pre- 

 cipitated. 



Insoluble. 



Slightly soluble. 

 Insoluble. 



Slightly soluble. 

 Fairly soluble. 

 Insoluble. 



Luciferin. 



Not precipitated. 



Partially precipi- 

 tated. 



Not precipitated. 



Nearly completely 

 precipitated. 



il U it 



Soluble. 



Fairly soluble. 

 Slightly " 

 Soluble. 

 Fairly soluble. 

 Soluble. 



Fairly soluble. 



Slightly " 

 Very slightly sol- 

 uble. 



Soluble. 



(I 



Insoluble. 



Fairly soluble. 



