THE CHEMISTRY OP LIGHT PRODUCTION 119 



Table 8 

 Properties of Photogenic Substances from Cypridina 



Property 



Lucif erase 



Luciferin 



Salting out 



By saturation NaCl 



By half saturation MgSO«. . . 

 By saturation MgSO* 



By saturation MgSO«+acetio 



acid 

 By half saturation (NH4)jS0._ 

 By saturation (NH4)2S04 



By saturation (NH4)jS04+ 

 acetic acid 



Solubility in 



Methyl alcohol 



Ethyl alcohol 



90 per cent. 



70 per cent. 



50 per cent. 



Propyl alcohol 



Isobutyl alcohol 



Amyl alcohol 



Benzyl alcohol 



Acetone 



90 per cent 



70 per cent 



50 per cent 



Ethyl acetate 



Ethyl propionate 



Ethyl butyrate 



Ethyl valerate 



Ethyl nitrate 



Glycerine 



Glycol 



Ether 



Chloroform 



Carbon disulfide 



Carbon tetrachloride 



Benzol 



Toluol 



Xylol 



Petroleum ether 



Anilin 



Glacial acetic' acid 



Not precipitated 



Nearly completely 

 precipitated 



Slightly precipitated 

 Completely precipi- 

 tated 



Insoluble 



Do. 



Do. 



Do. 

 SUghtly soluble . 

 Insoluble 



Do. 



Do. 



Do. 



Do. 



Do. 

 Slightly soluble 

 Fairly soluble 

 Insoluble 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Not precipitated. 



Partially precipitated. 



Do. 



Not precipitated. 

 Nearly completely 



precipitated. 

 Nearly completely 



precipitated. 



Soluble. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Fairly soluble. 

 Slightly soluble. 

 Soluble. 

 Fairly soluble. 

 Soluble. 



Do. 



Do. 



Do. 

 Fairly soluble. 



Do. 

 Slightly soluble. 

 Very slightly soluble. 

 Soluble. 



Do. 

 Insoluble. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do., 



Do. 



Do. 

 Fairly soluble. 



9 



