Am.  Jocr.  Pharm.  " 
Feb.  1,  1873.  j 
Extracts  containing  Chlorophyll. 
81 
This  is  an  improvement  upon  the  old  method,  for  the  presence  of 
the  albumen  not  unfrequently  set  up  fermentation,  nitrous  acid  was 
evolved,  and  nitrites  and  nitrates  formed  in  the  extracts,  probably  at 
the  expense  of  the  active  principles. 
With  the  view  of  ascertaining  if  any  further  improvement  can  be 
effected  in  these  preparations,  I  have  made  a  series  of  weighings  of 
the  insoluble  coloring  matter  contained  in  different  samples  of 'these 
extracts,  obtained  from  some  of  the  principal  pharmaceutical  estab- 
lishments in  London.    The  results  are  as  follows  : — 
Samples. 
No.  1 
No.  2 
No.  3 
EXTRACT  OF  ACONITE. 
Quantity 
employed. 
100  grains 
100  grains 
100  grains 
Amount  of  Chlorophyll 
obtained. 
1*5  grains. 
4*  grains. 
4*  grains. 
No.  1  was  of  the  consistence  of  thick  treacle,  the  filtration  went  on 
rapidly  and  satisfactorily,  but  Nos.  2  and  3  took  some  days  to  filter, 
and  it  was  found  that  when  warm  water  was  employed  in  washing  out 
the  extract,  the  filtrate  on  cooling  became  turbid  ;  consequently 
weighings  were  made  of  the  insoluble  matter  which  had  been  washed 
with  cold  distilled  water ;  they  were  both  firm  enough  to  roll  into 
pills. 
Samples. 
No.  1 
No.  2 
No.  3 
No.  4 
All  these  were 
EXTRACT  OF  BELLADONNA. 
Quantity 
employed. 
100  grains 
100  grains 
100  grains 
100  grains 
firm  extracts. 
EXTRACT  OF  HEMLOCK. 
Amount  of  Chlorophyll 
obtained. 
14  grains. 
17  grains. 
18  grains. 
15*5  grains. 
Amount  of  Chlorophyll 
obtained. 
No.  1  .  .  100  grains 
No.  2  .  .  100  grains 
No.  3  .  .  100  grains 
No.  4  .  .  100  grains 
No.  5  .  .  100  grains 
Nos.  1,  2,  3,  and  4,  were  tolerably  firm,  but  No.  5  was  unusually 
soft. 
14  grains. 
9  grains. 
16  grains. 
15  grains. 
8  grains. 
