4 Lino’), It had the following ‘constants: boiling ee 143° to 146° (1 
a, slightly dextrorotary; np 1.5037 (undercooled). Elementary analysis” Ide 
which did not quite agree with a sesquiterpene alcohol, nor with a compou Cast 4 
‘It may therefore be assumed that the authors had to deal with a mixture 
: quiterpene alcohol, Cis Has O, with elemicin, Ci2Hie Os. i means of he sf 
See at 214 to 218° (10 mm.); deoo 1.0287; —6°; 
devo 0.9411: ay — 5°; np 1.5030: The authors. designate. the s1eakol Sone 3! 
from the BN eed refraction (found 69.73, calculated for Cis Hog O le 5 69. 77) it can 
be a question of a monocyclic, doubly unsaturated alcohol. This is the first time 
‘a monocyclic sesquiterpene alcohol has been established in nature, though mono 
ae: Sesquiterpenes have been observed before now. By dehydration by means of Bee 
the same result was phined in all cases. “In Splitting off water ae janie a 
monocyclic sesquiterpene was formed with three double linkings, probably mixed hn 
some bicyclic sesquiterpene. The constants of the monocyclic sesquiterpene were asi 
follows: b. p. 115 to 117° (10 mm.); doo 0.8797; «p to the right; np 1 A971; molecular 
refraction found 67. 84; calculated for CisHes/3 67.86. The sesquiterpene was ‘called 
elemene. Elemene cannot be reduced by means of sodium and alcohol, from which it 
follows that it probably does not contain any conjugated double linkings. On reductio on 
with hydrogen and platinum in ethereal solution it formed a hydrocarbon. Cis Hy0, _ 
is hexahydroelemene, of the boiling point 114 to 116° (10 mm.); doo 0.8450; [a], — 4.89; 
. np 1.4621; molecular refraction found 68.35, calculated for CisH3o 69.04, The- dif-— 
ference between the calculated refraction and the refraction actually found may possibly 4 
be due to a slight admixture of a bicyclic compound. Elemol also does not appear 
to possess a conjugated double linking, as it is reduced neither by sodium nor alcohol. 
By means of platinum and hydrogen it was readily reduced to tetrahydroelemol, CisHo0. . 
from which tetrahydroelemene C,;Hos is formed by means of dehydration. Boiling point 
117 to 119° (10 mm.); d2o00.8659; ap — 20.49; np 1.4760. This tetrahydroelemene, when 
reduced with platinum and hydrogen, yielded a hexahydroelemene. which n plates 
corresponded with the hexahydroelemene described above. 
wa 
From time to time elemi-like products appear in commerce whieh: are us 
called after the country they come from. Thus the gum of Dacryodes hexandra ; 
called West Indian or Dry elemi, whereas in the West Indies it is known. by the name 
of Gommier resin. Aromatic oil-gums from different parts of Western Africa are s 
-- times called West African elemi, such as Liberia, Cameroons and Southern 
elemi*). Formerly elemi resin was used in considerable. quantities for m 
poses, as an addition to ointments and plasters; to-day this is hardly. the 
: longer, it being used principally in the manufacture of printers’ ink and C 
as an addition to varnishes. The comparatively small demand appears to bi 
covered by the quantities obtained in the peep ae a : 
~ : ae 
7 ch Sh 
