I 
5 1 8  Ex tr -actum  Cannabis  Indie <e.        { ^^Sg™ 
EXTRACTUM  CANNABIS  INDICT. 
By  William  H.  Deprez,  Ph.G. 
Abstract  jrom  an  Inaugural  Essay. 
The  author  endeavored  to  ascertain  the  quality  of  commercial 
extract  of  Indian  hemp  from  its  behavior  to  solvents.  The  amount  of 
moisture  was  first  determined  by  exposing  100  grains  of  the  extract  to 
the  heat  of  a  water  bath  until  it  ceased  to  lose  weight.  The  residue 
was  next  treated  with  water  until  deprived  of  all  principles  soluble  in 
this  menstruum,  and  the  undissolved  portion  dried  and  weighed.  A 
portion  of  the  undissolved  residue  was  then  successively  treated  with 
petroleum  benzin,  benzol  and  alcohol,  and  in  each  case  the  amount  of 
the  dissolved  matter  ascertained.  A  small  residue  was  finally  left,., 
which  was  found  to  be  insoluble  in  ether,  chloroform,  olive  oil,  oil  of 
turpentine  and  potassa.  The  samples  examined  were  :  I,  one  prepared 
from  gunjah  by  the  process  of  the  U.  S.  Pharmacopoeia  ;  2,  a  sample 
prepared  in  Germany  ;  3  and  4,  two  samples  prepared  by  two  different 
manufacturers  in  England.  Calculated  for  100  grains  of  the  original 
extracts,  the  results  were  as  follows  : 
Soluble  in 
Loss  by  Heat. 
Water. 
Petroleum  Benzin. 
Benzol. 
Alcohol. 
Insoluble. 
Total. . 
1 
i'5 
73*8 
i8-4 
1  "4 
3'3 
IOO'I 
2 
1*2 
i*7 
73-8 
I7-5 
2-3 
3*5 
ioo'a 
3 
IO-5 
3 '4 
65-4 
i6-5 
i'4 
27 
99'9 
4 
2'0 
1  8*8 
60*2 
!5*4 
09 
27 
100  0 
GLEANINGS  FROM  THE  GERMAN  JOURNALS, 
By  Louis  von  Cotzhausen,  Ph.G. 
Codliver  Oil. — Th.  Husemann  compared  the  medicinal  virtues  of 
different  kinds  of  codliver  oil  with  the  object  of  determining  the  active 
constituents.  He  denies  the  presence  of  any  particular  active 
principle,  curing  scrophula  and  lung  diseases,  and  believes  that  its 
efficacy  is  entirely  due  to  the  mixture  of  the  glycerides  of  fatty 
acids,  it  differing,  however,  from  other  oils  in  being  absorbed  and  in 
oxidizing  more  quickly  in  the  human  body.  He  states  on  the  authority 
of  Professor  Alm£n,  who  has  devoted  many  years  to  the  analysis  and 
study  of  the  different  kinds  of  codliver  oil  of  commerce,  that  a  nearly 
white  oil  may  be  made  by  heating  fresh  codlivers,  previously  cleaned 
