76 - 
Caryophyllene. The fraction boiling at 120° to 125°, at a 
pressure of 6 mm, which according to previous examinations consists 
of a sesquiterpene, was first of all tested for caryophyllene, whose 
presence was considered probable in view of the similarity between 
pimento oil and oil of cloves. By attaching water by means of sul- 
phuric acid and glacial acetic acid, according to Bertram-Walbaum's 
method, a good yield was obtained of the caryophyllene alcohol melt- 
ing at 97° which was identified by its phenyl urethane melting at 
136° to 137°. The melting point of the caryophyllene nitrosate re- 
crystallised from benzene was found at 159°, that of the nitrol piperi- 
dide at 146^ to 147°. As the corresponding compounds from clove 
oil caryophyllene showed the same melting points, it appears that the 
data given in literature (melting point 148° to 149^, and 141° to 143°) 
are a little too low. The examination hereof has not yet been concluded, 
Eugenol methyl ether. The high specific gravity (di50 == 0,941 ) 
of the fraction boiling at 120° to 125^ (6 mm) pointed to the presence 
of an oxygenated compound, in addition to caryophyllene. A methoxyl- 
determination after Zeis el had a positive result, and by oxidation of 
a fraction boiling at 248° to 260° with potassium permanganate, ver- 
atric acid melting at 179° to 180° was obtained, which proved the 
presence of eugenol methyl ether. Attempts to produce tribrommethyl 
eugenol failed, probably owing to the formation of brominated products 
of caryophyllene. 
Eugenol. The oil liberated from the alkaline liquors by means 
of sulphuric acid passed over almost entirely at 120^ to 125° on 
distillation at 5 mm pressure, and boiled at ordinary pressure at 249^ 
to 251. By the formation of the benzoyl compound of the melting 
point 69^ to 70°, and also by the physical constants (d^50 = 1,0717; 
nj)2o° = Ij54o62) it was identified sufficiently as eugenol. 
Palmitic Acid. The distillation-residue of the constituents soluble 
in alkali solidified after a short time in the form of crystals. Petroleum 
ether dissolved almost only the crystals, whilst the resinous impurities 
remained behind undissolved. After recrystallisation from aqueous 
alcohol, fine small needles were obtained, which were identified by their 
melting point of 60^, and by analysis of the silver salt, as palmitic acid. 
0,1644 gi^- of silver salt yielded 0,0462 gm. Ag. 
Calculated for C-LgHg^OgAg: Found: 
Ag 27,00/, 28,10/,. 
The further examination dealt with a few quantitative estimations 
of a normal pimenta oil distilled by ourselves, which had the following 
constants: d^^o = 1,044; «d = — 4°3o'; ^cid number and saponifi- 
cation number very low, and impossible to determine correctly in 
consequence of a strong brown colouration. The eugenol- content was 
