318 
Tannins  of  Some  Ericacece. 
Am.  Jour.  Pharru. 
June,  1896. 
ursi  had  been  added  acquired  yellow  colors,  while  those  in  which 
the  tannins  of  trailing  arbutus,  gaultheria,  and  mountain  laurel  had 
been  dissolved,  developed  red  colors.  When  the  liquids  had  at- 
tained the  boiling  point  those  representing  the  tannins  of  chimaphila, 
manzanita  and  uva  ursi  commenced  to  deposit  brownish  precipitates, 
while  red  deposits  separated  from  the  solutions  corresponding  to 
the  principles  from  trailing  arbutus,  gaultheria  and  mountain  laurel. 
These  solutions  were  boiled  for  two  hours,  and  then  allowed  to  cool. 
The  insoluble  substances  which  had  separated  were  then  filtered  off. 
They  were  washed  with  cold  water  and  then  allowed  to  dry  in  the 
air.  They  were  next  treated  with  hot  water,  which  showed  a  solvent 
action  on  all  of  them.  The  solutions  obtained  by  the  use  of  hot 
water  gave  the  following  reactions : 
Reagent. 
Chimaphila. 
Trailing 
Arbutus. 
Gaultheria. 
Mountain 
Laurel. 
Manzanita. 
Uva  Ursi. 
Ferric  chloride  1 
and  \ 
jdium  carbonate  J 
Reddish-yellow 
color. 
f  Olive-brown 
\  color. 
Plum 
color. 
Olive-brown 
ppt. 
Olive-brown 
ppt. 
Bluish  color, 
green  ppt. 
Brown  ppt. 
f  Deep  brown 
1  PPt- 
Brown 
ppt. 
Blackish- 
brown  color. 
Dark  brown  ) 
ppt.  } 
Brown  ppt. 
atassium  cyanide  . 
Red  color. 
f  Deep  red 
(  color. 
Dark  red 
color. 
Greenish-yel- 
low color. 
Reddish  yel- 
low color. 
Yellowish 
color. 
Some  of  that  part  of  the  insoluble  product  from  the  action  of  the  2 
percent,  hydrochloric  acid,  which  was  undissolved  by  the  hot  water, 
was  thereafter  treated  with  alcohol,  which  dissolved  all  of  them 
completely.  The  alcoholic  solutions  so  obtained  gave  these  reac- 
tions with  ferric  chloride  : 
Chimaphila. 
Trailing 
Arbutus. 
Gaultheria. 
Mountain 
Laurel; 
Manzanita. 
Uva  Ursi. 
Brownish -red 
color. 
Green  color 
and  ppt. 
Green  color 
and  ppt. 
Plum  color  and 
ppt. 
Green  color 
and  ppt. 
All  dissolved  in 
hot  water. 
The  remainders  of  the  insoluble  portions  were  treated  with  potas- 
sium hydrate  solution,  which  also  readily  dissolved  the  substances 
with  the  production  of  colored  solutions.  All  of  these  solutions, 
when  made  acid  with  acetic  acid,  deposited  precipitates  resembling 
in  appearance  the  substances  which  had  been  dissolved.    The  acid 
