68 
ON RESIN OF GUAIACUM. 
cerning balsam of tolu, made me hope that I might find in 
these two resins, analogous, if not the same principles. 
Knowing that several chemists are now studying guaiacum, 
and being desirous of preserving priority for investigations 
long since commenced with regard to all the resins, and 
guaiacum in particular, I have communicated these results, 
although incomplete, in the hope that I shall very soon ter- 
minate them and submit them to the Society. 
M. Pelletier informed the Society that he also was en- 
gaged in the examination of guaiacum, and that he discover- 
ed in that substance the presence of two resins, one of 
which was capable of combining with the alkalis, while the 
other did not possess this property. Having submitted 
guaiacum to distillation, he obtained, like M. Deville, three 
different substances: — 
1. Alight oil. 
2. A crystallisable matter, perfectly clear, which vola- 
tilises with the aid of steam. 
3. A dense oil, which appeared to him identical with 
creosote. 
Ibid, from Trans. SocitU Philomatique de Paris. 
