JLLMlJNKbCENCE AND INCANDESCENCE (Vfl 39 



ski (1880) found the light of lophin oxidized in alco! 

 caustic alkali, examined with, a two-prism spectroscope, 

 to give a continuous spectrum, brightest at E, with the 

 red and violet ends lacking. Trautz (1905, p. 101) states 

 that the pyrogallol-formaIdehyde-Na2C03-H202 reaction 

 gives a continuous spectrum from the red to the blue green 

 with maximum brightness in the orange. Weiser (1918 

 a) has studied the spectra of some chemiluminescent reac- 

 tions by photographing the light behind a series of color 

 screens. He finds also that the spectra are short, with 

 maximum intensity in various regions. Thus, amarin 

 oxidized by chlorine or bromine, extends from the yellow 

 to greenish blue with a maximum in the green while phos- 

 phorus, dissolved in glacial acetic acid and oxidized with 

 H2O2, luminesces from yellow green to violet. 



The spectra of luminous animals are quite similar to 

 those of chemiluminescent reactions. Moreover, as we 

 hav£_seen..j ±imiiurQihes'cince°lLs'"essentlally an oxylumi- 

 nesc ence, sinc e oxygen is necessary f or the reaction. All 

 lumxpims..ajiimals.aka.peqjaJ,Ke.oxyg 



Therefore^ bioluminea cgaee-.ajid-i3hemilmn,in ^s,cenc e _are^ 

 sumlar]ph^sagfla-.and they differ ,lrflm .jIL the^ other 

 forms of luminescence which we have considered. The 

 li^tl,frQinJumiai3ufijajiim^ 



,§2mejjjl3fiiaiuifi4«»<iia^ 



write the structural formula of this photogenic substance 

 and tell how the oxidation proceeds, the problem of light 

 production in animals will be solved. 



