218 ON SOME OF THE CRYSTALLINE CONSTITUENTS OF OPIUM. 
a very important and remarkable relation would be brought out between madder 
and opium. At the same time I must mention that my experiments are not as 
yet sufficiently advanced to enable me to speak with any degree of certainty on 
this point. I have also ascertained that apophyllic acid is an acid methylamide 
corresponding in its constitution with oxamic and tartramic acids, but contain- 
ing methylamine in union with a non-nitrogenous acid. I have likewise contrived 
a process by which opianyl can be obtained from narcotine by a different decom- 
position from that described in my former paper, and with absolute certainty. 
The full details of these and other matters required to complete the history 
of these compounds, I must reserve for a future paper. 
