Cymene  from  Oil  of  Turpentine.  117 
is  a  true  combination  very  soluble  in  water,  is  on  the  contrary  slightly 
soluble  in  glycerin  itself.  Commencing  at  experiment  5,  it  commu- 
nicated to  the  liquor  a  latescence  more  and  more  opaque,  and  whilst 
the  undissolved  lime  was  precipitated  rapidly  or  remained  upon  the 
filter,  the  glycero-calcic  compound  remained  for  a  long  time  in  sus- 
pension, or  even  passed  through  the  paper.  In  short,  the  glycerinate 
of  lime  is  formed  in  larger  proportion  as  the  quantity  of  glycerin  is 
increased,  but  being  less  soluble  in  the  latter  than  in  water  remains 
in  suspension. 
These  solutions  appear  to  the  author  to  be  susceptible  of  the  fol- 
lowing applications  : 
(1)  In  a  chemical  point  of  view,  since  they  remain  unaltered  during 
a  long  time,  they  might  advantageously  replace  as  alkaline  liquors 
the  changeable  solutions  of  saccharated  lime. 
(2)  Pharmaceutical^  it  would  allow  of  the  simplification  of  the 
preparation  of  the  lime  liniment,  and  yield  a  superior  product.  The 
Codex  orders  one  part  of  oil  of  almonds,  and  nine  parts  of  lime 
water,  to  be  agitated  together,  and  the  separation  of  the  soap  which 
floats  on  the  top.  If,  in  the  place  of  ordinary  lime  water,  equal  parts 
of  almond  oil  and  of  lime  water  containing  10  per  cent,  of  glycerin 
are  simply  agitated  together,  a  consistent  calcareous  soap  is  produced, 
which,  even  after  several  weeks,  loses  none  of  its  consistence  or  ho- 
mogeneity. 
(3)  Considered  therapeutically,  the  addition  of  the  glycerin,  which 
besides  is  produced  in  small  quantity  in  the  ordinary  process,  appears 
to  constitute  an  excellent  adjuvant. — Pharm.  Journ.  (Lond.),  Jan. 
10, 1874.   
ON  CYMENE  AS  A  CONSTITUENT  OF,  AND  DERIVATIVE  FROM, 
OIL  OF  TURPENTINE. 
By  C.  R  A.  Wright,  D.Sc. 
On  Feb.  6,  1873,  the  writer  read  before  the  London  Chemical  So- 
ciety a  paper  (Chemical  News,  vol.  xxvii.,  p.  82  ;  Journ.  Ohem.  $oc.y 
[2],  xi,  549)  wherein  it  was  shown  that  there  are  reasons  for  supposing 
that  the  small  quantities  of  terephthalic  acid  obtained  by  the  oxida- 
tion of  certain  terpenes  are  really  derived,  not  from  the  terpene  itself, 
but  from  cymene  simultaneously  present ;  and  it  was  moreover  stated 
that  cymene  had  been  actually  isolated  from  two  such  terpenes  (viz. 
myristicene  from  nutmeg  oil  and  terebenthenes  from  oil  of  turpen- 
tine) by  a  process  suggested  to  the  writer  by  Dr.  Hugo  Miilier,  viz.,. 
