170  Analysis  of  Pycnanthemum  Linifolium.  { ■AmApTa,imTm' 
an  approximately  constant  weight  at  about  no°,  the  loss  being 
taken  as  equivalent  to  the  weight  of  ethereal  oil ;  the  amount  stated 
is  therefore  probably  very  considerably  too  low.    The  results  of  the 
estimations  may  be  tabulated  as  follows  : 
Per  Cent. 
Moisture,  etc.,   9*13 
Ash,   573 
Benzol  extract : 
Ethereal  oil,   -14 
Substance  not  volatile  at  no°  : 
Soluble  in  hot  alcohol,  1*59 
Insoluble  in  hot  alcohol,                                -51       2*10  2*24 
Ether  extract,                                                 .  1*14 
Alcohol  extract,   1-33 
Aqueous  extract : 
Mucilage,  etc.,    v   -68 
Glucose,   173 
Undetermined,   571  8'i2 
Alkaline  aqueous  extract : 
Albuminoids,  etc.,  precipitated  by  alcohol,  -91 
Undetermined,   2*37  3*28 
Acid  aqueous  extract,   '59 
Starch,   -93 
Lignin,  etc.,  removed  by  chlorine-water,  etc.,  .  26*42 
Cellulose,  etc.,   32*44 
Loss,   8-65 
IOO'OO 
The  residue  left  on  evaporation  of  the  benzol  extract  was  soft 
and  of  an  olive  green  color.  The  portion  of  the  non-volatile  sub- 
stance left  undissolved  by  hot  alcohol  consisted  mainly  of  a  dark- 
green  elastic  substance,  soluble  in  chloroform  ;  also  of  some  grayish- 
green  matter,  probably  somewhat  soluble  in  hot  alcohol.  The 
portion  dissolved  by  alcohol,  on  evaporation  of  the  solvent,  remained 
as  a  dark-green  residue.  This  benzol  extract  closely  resembled  the 
benzol  extract  of  P.  lanceolatum,  but  differed  in  odor. 
The  ether  extract  was  green.  The  dried  residue  was  treated  with 
acidified  water,  and  the  filtered  liquid  tested  for  alkaloids  and  gluco- 
sides,  which  were  not  detected. 
The  dried  residue  of  the  alcohol  extract  was  greenish-brown. 
It  was  treated  with  cold  water,  and  the  mixture  filtered.  The 
filtrate,  which  was  not  quite  clear,  gave  the  following  reactions : 
