Am.  Jour.  Pharm.  \ 
April,  1883,  j 
Analytical  Researches  and  Investigations, 
191 
Unguentum  Terebinthince, — Turpentine,  yellow  wax,  oil  of  turpen- 
tine, equal  parts. 
Vinum  camphoratum. — Dissolve  camphor  1  part  in  alcohol  1  part, 
and  gradually  add,  with  agitation,  to  a  mixture  of  mucilage  of  gum 
arable  3  parts  and  good  white  wine  45  parts.    Whitish,  turbid. 
Vinum  Chinee. — Mix  tincture  of  cinchona  and  glycerin,  of  each  100 
parts  with  sherry  wine  300  parts,  and  after  three  weeks  filter.  Clear,, 
brown -red. 
Vinum  Pepsini. — Triturate  pepsin,  glycerin,  and  water,  each  50 
parts,  to  a  uniform  mixture,  add  good  white  wine  1845  parts  and  hy- 
drochloric acid  5  parts ;  macerate  for  6  days,  shaking  frequently,  then 
filter.    Clear,  yellowish. 
ANALYTICAL  RESEARCHES  AND  INVESTIGATIONS. 
Collated  by  Prof.  Frederick  B.  Power,  Ph.D. 
The  Obtainment  of  Morphine  in  a  Pure  State  in  Forensic  Investiga- 
tions. By  Edmund  Scheibe. — In  the  determination  of  organic  poisons 
in  portions  of  a  cadaver,  articles  of  food,  etc.,  the  difficulty  has  to  be 
contended  with  that  with  the  isolation  of  the  poison,  coloring  matters, 
and  other  constituents  of  the  subject  under  examination  are  at  the 
same  time  isolated,  which  interfere  with  the  reactions.  This  is  espe- 
cially the  case  with  morphine,  which  is  usually  extracted  by  means  of 
warm  amylic  alcohol,  this  indeed,  being  best  adapted  to  the  purpose^ 
but  at  the  same  time  taking  up  many  impurities.  Since  morphine  is 
abstracted  from  the  alkaline  solution  by  amylic  alcohol,  it  is  customary 
for  the  removal  of  the  impurities  to  first  agitate  the  acid  solution  with 
amylic  alcohol.  If,  however,  for  the  purpose  of  further  treatment  the 
acid  solution  is  rendered  alkaline,  forms  of  impurities  are  again  pro- 
duced which  pass  into  the  amylic  alcohol.  If  the  liquid  be  again 
acidulated,  and  the  operation  repeated,  the  danger  is  incurred  of  losing 
much  of  the  sough t-for  poison  or  of  causing  its  decomposition. 
After  a  series  of  experiments  for  obtaining  the  alkaloid  in  a  pure 
form  with  the  use  of  various  etherial  and  other  liquids,  the  author  has 
come  to  the  conclusion  that  a  mixture  of  10  parts  of  ether  and  1  part 
of  alcohol  is  well  adapted  to  the  purpose. 
For  such  cases,  therefore,  in  which  the  separation  of  small  amounts 
of  morphine  is  required,  the  following  method  is  proposed  : 
