220  Gleanings  from  the  German  Journals.  { Am'^ay!"il^arm' 
ether,  when  a  grayish  green  crystalline,  odorless  substance  was 
obtained,  rather  soluble  in  alcohol  (95  per  cent.)  and  ether,  but  diffi- 
cultly soluble  in  chloroform  and  benzol;  the  crystals  boiled  with 
aqueous  alkaline  hydrates  were  decomposed,  giving  the  character- 
istic odor  of  cineol.  This  test  is  serviceable  in  the  examination  of 
mixtures  containing  hydrocarbons,  like  oil  of  turpentine  ;  to  dissolve 
one  gram  iodol,  100  cc.  of  turpentine  oil  are  required  ;  the  addition 
of  5  per  cent,  cineol  to  the  oil  enables  58  cc.  to  dissolve  the  iodol, 
crystals  separating  after  twenty-four  hours'  standing;  if  10  per 
cent,  cineol  be  present  48  cc.  will  be  required,  crystals  separating 
after  three  hours.  In  applying  the  test  from  3- 15  drops  of  the  oil 
were  agitated  with  0-01-0-05  gm.  iodol.  If  necessary,  more  of  the 
oil  was  added  drop  by  drop  until  perfect  solution  resulted  ;  the 
test  was  then  set  aside  and  examined  frequently  during  twenty- 
four  hours  to  see  if  crystals  had  separated,  these  then  were  tested 
for  cineol  by  heating  with  potassium  or  sodium  hydrate  solution 
and  noting  the  odor.  All  samples  of  the  following  oils  readily 
gave  the  test :  Santonica1  hyssop,  Kuro-moji,  laurel,  lavandula  vera, 
lavandula  Spica,  rosemary  and  sage ;  in  the  following  oils  some 
anomalies  are  to  be  noted:  Absinth,  of  German,  French,  Russian 
and  American  samples,  only  those  of  the  first  origin  gave  the  test ; 
eucalyptus,  of  a  large  number  of  samples  examined  only  three  failed 
to  respond  ;  galangal,  two  of  three  samples  responded  ;  millefolium, 
some  Russian  and  German  samples  gave  the  test,  but  not  uniformly  ; 
origanum,  three  of  four  samples  yielded  affirmative  tests ;  savory, 
only  one  out  of  four  samples  responded ;  wild  thyme,  four  of  eight 
samples  gave  the  test.  By  distilling  the  following  oils  (which 
themselves  did  not  respond)  with  steam  and  applying  the  test  to 
the  first  portions  of  the  distillate  the  test  was  also  obtained  :  Basil, 
Mentha  crisp  a  and  M.  piperita  from  all  sources.  This  modification 
of  the  test  may  detect  cineol  in  oils  which  directly  tested  will  not 
respond  ;  the  nature  of  the  crystalline  compound  has  not  as  yet 
been  ascertained. — Pharm.  Ztschr.  f.  Russl.,  1893,  Nos.  4  and  5. 
Syrup  of  Iodide  of  Iron,  if  made  from  sugar  containing  ultramarine, 
will  uniformly  assume  the  red  color  which  has  so  frequently  been 
commented  upon ;  this  coloration  was  never  observed  when  rock 
candy  was  used  in  the  preparation  of  the  syrup. — J.  Martenson 
(Pharm.  Ztsch.  f.  Russl.),  1893,  IO°- 
Hydrargyrum  sozoiodolicum  is  recommended  to  be  dissolved  in 
