Am.  Jour.  Pharm.  "j 
Feb.  1,  1872.  / 
Oil  of  Winter  green. 
71 
grin,  were  soluble  in  water,  and  consisted  of  0*8103  sulphate  of  po- 
tassa,  1-1629  chloride  of  potassium,  1*1907  carbonate  of  potassa, 
0-0111  alkaline  phosphate;  the  insoluble  portion  consisted  rnainly 
of  phosphate  of  lime  (1-6894),  and  of  phosphate  of  magnesia^  carbon- 
ate of  lime  and  silica. — Jonrn.  de  Pharm.  et  de  Ohim.,  1871,  p.  337 
—341. 
Tanacetic  Acid.  By  Frosini  Merletta.  The  residue  from  distilling 
the  tops  of  tansy  is  filtered,  concentrated  to  the  consistence  of  honey, 
then  treated  with  chalk  and  animal  charcoal,  and  finally  evaporated  ; 
this  residue  stirred  into  water  acidulated  at  first  with  hydrochloric, 
afterwards  with  acetic  acid,  colored  crystals  of  tanacetic  acid  are  ob- 
tained, which  are  washed  with  distilled  water.  It  is  insoluble  in  water, 
but  soluble  in  alcohol  and  ether,  and  possesses  an  acrid  and  bitter 
taste.    Its  salts  are  crystallizable. 
As  a  vermifuge  it  acts  in  the  same  doses  as  santonin. — Ibid.,  368. 
Preparation  of  Crystallized  Indigotin.  C.  Meliu  uses  hot  carbolic 
acid,  which  deposits  the  indigotin,  on  cooling,  in  crystals.  To  avoid 
the  solidification  of  the  phenic  acid,  the  author  adds  a  little  alcohol, 
or  benzine,  or  camphor  ;  one  part  of  the  latter  added  to  15  per  cent, 
phenic  acid,  liquefies  it  the  same  as  benzoic  and  glacial  acetic  acids. 
Operating  with  500  grm.  carbolic  acid  the  author  obtained  2  grm. 
pure  crystallized  indigotin.  It  is  recommended  to  wash  the  indigo 
previously  with  water,  dilute  hydrochloric  acid  and  several  times  with 
boiling  alcohol.  This  indigotin  will  answer  a  good  purpose  in  colori- 
metric  assays. — Ibid.,  412. 
Transformation  of  Cane- sugar  into  Glucose.  Raoult  enclosed  a  solu- 
tion of  one  part  of  pure  cane-sugar  in  5  per  cent,  of  water  into  glass 
tubes,  removed  the  air  by  boiling  and  closed  the  tubes  over  the  lamp. 
One  tube,  kept  for  five  months  in  the  dark,  contained  the  cane-sugar 
unaltered  ;  another  tube,  kept  in  the  light,  contained,  after  the  same 
time,  a  transparent  solution,  free  from  microscopic  vegetation  ;  about 
one  half  of  its  cane-sugar,  however,  had  been  transformed  into  glucose. 
—Ibid., Mb.   _____ 
OIL  OF  WINTERGREEN. 
By  Dr.  J.  E.  De  Vry. 
In  reading  the  note  on  "  Oil  of  Andromeda  Leschenaultii  "  on  page 
285  of  this  Journal,*  I  supposed  it  would  be  of  some  interest  to  pub- 
">:"  See  page  547  of  our  last  volume. 
