1 66      Comparative  Examination  of  Kramer za  Roots.  {Am-l^-Ji^m- 
A  COMPARATIVE  EXAMINATION  OF  KRAMERIA  TRI- 
ANDRA  AND  KRAMERIA  ARGENTEA. 
By  R.  G.  Dunwody. 
Contribution  from  the  Chemical  Laboratory  of-  the  Philadelphia  College  of  Pharmacy. — 
No.  70. 
Read  before  the  Philadelphia  College  of  Pharmacy  at  the  Pharmaceutical  Meeting, 
March  18. 
Krameria  argentea  is  largely  sold  in  the  market  at  the  present 
time,  and  in  order  to  determine  its  value,  compared  with  Krameria 
triandra,  I  estimated  the  tannin  in  reliable  samples  of  the  two. 
An  infusion  was  made  of  each  of  the  drugs  containing  10  grams 
in  250  cc.  A  portion  of  each  of  them  was  precipitated  with  a  solu- 
tion of  gelatin  and  alum,  and  the  precipitate  dried  between  the 
temperature  of  100  and  no°  C,  then  weighed;  the  Krameria 
triandra  yielded  8-4  per  cent.,  while  the  Krameria  argentea  yielded 
7-2  per  cent.    These  estimations  were  repeated  with  similar  results. 
In  order  to  determine  the  constituents  of  the  two  drugs,  fifty 
grams  of  each  were  subjected  to  the  usual  plant  solvents,  with  the 
following  results  : 
Krameria  triandra.  Krameria  argentea 
Petroleum  Ether,   '40  "240 
0*40  240 
Ether,  { soluble  in  water,   -53  3*986 
'  I  soluble  in  alcohol,   3*09  '024 
Total,   3-62  4-010 
Absolute  Alcohol,   { soluble  in  water>  '     5*531  3'°4 
insoluble  in  water,    17*485  9*60 
Total,   23*016  12.64 
Distilled  Water,  /Tannin,   1-360  r57o 
I  Extractive,     ....      -368  -368 
Total,   1-728  i"938 
Alkaline  Extract,   \  Pectin>  r5oo 
I  Extractive,    .  .  .  5*490  7-420 
Total,   6-8io  8-920 
Acid  Extract,  i  ^rarabin,   -160  '8io 
L  Extractive,    i'73i  'OI8 
Total,   1-891  -828 
Boiling  Water,  i  Starch,   -559  "S™ 
I  Extractive,   2*637  1*280 
Total,   3-196  1 -800 
Moisture,   11*256  11*256  11*947  n  947 
Ash,   2-445  2-445  2  785  2-785 
Residue  Cellulose  and  Lignin,    ....  44-345  44*345  53'IlS  53'IlS 
Loss,   1-293  1-293  i'774  I-774 
IOO'OOO  ioo-ooo 
IOO  "OOO     IOO  "OOO 
