196 RUBIACEZ. 
“ Although, after much labour and thought, I have failed 
to obtain an iodo-derivative in a crystalline form, I do not 
the method last described. That portion of the viscid mass 
which dissolved in a limited quantity of hot alcohol and 
separated out on cooling, gave, in a series of iodine deter- 
minations by combustion with quick lime, the equivalent of 
47°52 per cent. The formula (C*3HN2)2I52HI would require 
47°92 per cent of iodine. Throughout these combustions it was 
observed that a fatty looking substance distilled over, having 
the characteristic odour of naphthaline. From solution in 
alcohol it crystallized in white scales. ‘ 
Several attempts were made to produce a crystalline bromo- | 
derivative, but without success. The flocculent precipitate 
which resulted from the reaction of ethereal solutions of bro- 
mine and alkaloid, after treatment with hot alcohol, gave on 
cooling a granular looking body, which was chiefly remark-_ 
able for the facility with which it parted with a portion of it 
bromine. A stable and definite compound was not obtained. 
silver salt, which was decomposed by sulphuretted hydroget 
Filtration, evaporation, and -snbsequent purification of th 
