'212  Gleanings  from  European  Journals,  {^""•^i^isys^™' 
price  of  the  alcoholic  solution  will  be  about  two-thirds  that  of  vanilla. 
— Phar.  Zeitung^  1875,  No.  17. 
Solubility  of  Salicylic  Jcid  in  Glycerin, — One  part  of  salicylic  acid  dis- 
solves completely  in  fifty  parts  of  cautiously-heated  glycerin,  the  solu- 
tion remaining  clear  after  cooling,  and  may  be  diluted  without  separating 
the  acid.  A  solution  made  with  one  part  of  salicylic  acid,  20  to  30 
parts  of  glycerin  and  300  to  500  parts  of  hot  water,  has  been  used  for 
some  time  in  the  surgical  ward  of  the  Bremen  hospital. — Ihid.^  No.  18. 
Jlkanin  is  best  prepared  by  exhausting  alkanet  root  with  petroleum 
benzin,  which  leaves  a  brown  coloring  principle  behind  that  is  soluble 
in  ether.  It  may  be  obtained  entirely  inodorous  by  placing  the  evap- 
orating dish  finally  for  a  short  time  in  a  steam-bath. — Ibid, 
Propylamina  and  Tri?nethy lamina. — Schering  states  that  the  socalled 
propy lamina  as  obtained  from  herring-pickle  contains  only  10  per  cent, 
trimethylamina  and  some  ammonia  dissolved  in  water.*  Instead  of 
distilling  herring-pickle,  the  commercial  so-called  propylamina  is  now 
frequently  made  by  mixing  the  alkalies  in  the  above  proportions.  On 
the  application  of  a  moderate  heat,  the  commercial  article  must  give  off" 
inflammable  vapors,  but  not  after  the  previous  neutralization  with  hy- 
drochloric acid.  If  thus  neutralized  and  evaporated  to  dryness,  absolute 
alcohol  will  dissolve  from  the  residue  only  the  trimethylamina  salt. 
Pure  propylamina  has  an  ammoniacal  odor  and  boils  at  50°  C.  The 
odor  of  trimethylamina  is  similar,  but  its  boiling  point  is  -j-8°  C. — Ibid..^ 
No.  22. 
The  boiling-point  of  glycerin  was,  in  i860,  found  by  MendelejefF  to  be 
290°  C.  (corrected)  at  a  pressure  of  759*7  m.  m.  A.  Oppenheim  and 
M.  Salzmann  have  examined  some  colorless  crystallized  glycerin  pre- 
pared by  Sarg  &  Co.,  of  Vienna.  On  distilling  20  grams,  nearly  the 
whole  of  it  passed  over  at  282°  to  282*5°  C.  observed  =  289*67°  and 
290*17°  C.  corrected.  Only  a  few  grams  of  a  thick  syrup  was  left 
behind,  which  evolved  the  odor  of  acrolein  on  further  heating.  The 
colorless  and  inodorous  distillate  was  again  distilled,  leaving  a  minute 
quantity  of  syrup  in  the  retort  ;  the  observed  boiling-point  was  288°  C, 
or,  corrected,  290*4°  C,  the  barometric  pressure  being  756*55  m.  m. 
The  distilled  glycerin  did  not  solidify  at  a  temperature  of  between  — 12° 
and  — 20°  C. — Berichte  d.  deutsch.  chem.  Gesellsch.^  vii,  p.  1622. 
Pterocarpin  from  Red  Saunders. — On  mixing  500  parts  of  powdered 
See  also  "American  Journal  of  Pharmacy,"  1873,  P-  ^S^. 
