168 



REPORT — 1903, 



Whether the yellow substance produced by the oxidation of laudano- 

 sine is identical or not with uieconidine, the mere fact of the existence of 

 a coloured base in opium having a formula diflering from that of laudano- 

 sine by four atoms of hydrogen lends some support to the view of the 

 relationship of these substances set forth in this jiaper, and this hypothesis 

 receives some additional support from a comparison of the melting-points 

 of the substances. The question, however, as to whether laudanosine is 

 more closely related to corydaline or to tetrahydroberberine can only he 

 settled by further chemical investigation. 



The point which we wish to emphasise is that it must, from the simi- 

 larity of the curve plotted from its spectra, be built on the same plan as 

 these two closely related compounds, 



Laudanosine. 

 C,,iII,-NO,. M.P. 89° 



Solution in Alcohol. 

 (Fig. 23.) 



I 



