276 
Sangumaria  Canadensis. 
{ 
Am.  Jour.  Pharm. 
June,  1881. 
with  half  a  gallon  of  acidulated  water  (water  48  parts,  acetic  acid 
1  part),  which  precipitated  the  resin,  leaving  a  blood-red  solution ; 
the  resin  was  removed  by  filtration,  and  thoroughly  washed  with  dis- 
tilled water,  in  which  it  is  nearly  insoluble,  dried  and  weighed ;  the 
yield  was  985  grains  of  resin,  (a) ;  the  filtrate  was  marked  (6). 
Examination  of  Resin  (a). — The  resin  is  of  a  dull  pale  red  coloi% 
slightly  sternutatory,  has  an  acrid  taste,  and  is  of  waxy  consistence. 
An  examination  was  made  by  the  following  scheme  to  ascertain  its 
nature : 
The  resin  was  dissolved  in  boiling  alcohol  and  the  solution  cooled,  when 
a  precipitate  was  formed ;  separated  by  a  filter. 
put  rate. 
Treated  with  alcoholic  solution  of  acetate  of  lead,  which  pro- 
duced a  slight  brown  precipitate ;  separated  solution  from  pre-  Precipi- 
eipitate  by  filtering.  fate. 
Filtrate 
Treated  with  ammoniated  alcohol,  gave  a 
light  brown  precipitate,  which  was  sepa- 
rated by  filtration. 
Filtrate 
Treated  with  HoB 
filtered  from  the 
sulphide. 
Precipitate 
and  Suspended  in  alco- 
lead    hoi,  and  decompos- 
ed by  H28;  filtered. 
Filtrate.  \Precipitate. 
Evaporated  Black  lead 
nearly  to  sulphide  ; 
dryness, 
Filtrate. 
A 
gave  a  red 
resin,  dis- 
solving in 
cold  alco- 
hol, a  n  d 
li  a  V  i  n  g 
the  same 
properties 
as  the 
crude  re- 
sin. 
some  lit- 
tle color- 
ing mat- 
ter; is  pre-' 
cipitatedi 
with  it. 
light 
straw-col- 
ored liq- 
uid ;  eva- 
23oratedto 
dry  ness ; 
m  i  n  u  t  e 
residue. 
Precipi- 
tate. 
Black 
PbB, 
contain- 
ing lit- 
tle color- 
ing mat- 
ter. 
Preciptitate. 
Suspended  in  alco- 
hol, decomposed 
by  H,S  &  filtered 
Filtrate. 
Precipi- 
tate. 
Yellow- 
B  1  a  c  k 
i    s  h- 
PbS, 
brown ; 
contain- 
e V  a  po- 
ing  very 
little 
rated  to 
dryness 
coloring 
gave  a 
matter. 
very 
small 
amount 
of  a 
brown- 
red  res- 
in; spa- 
r  i  n  gly 
s  oluble 
in  ether 
Is  not  ab- 
solutely 
ins  olu- 
ble  in 
cold  al- 
cohol. 
By  treatment  with  hot  alcohol  and  cooling,  about  one-tenth  of  the 
resin  is  precpitated  as  a  dull  brown  pulverulent  substance  {x),  slightly 
