Am.  Jour.  Pharm.  1 
May,  1913.  j 
Lead  Number  of  Asafetida. 
20 1 
3  days  continued  to  lose  weight.  Duplicate  determinations  of  lead 
in  the  solution  291.5,  S306.0. 
No.  4. — Tears  same  as  No.  2,  the  fracture  remained  white  or 
only  turned  light  pink  203.0,  S257.0. 
No.  5. — Resin  from  No.  4  treated  same  as  No.  3,  296.7,  S300.6. 
No.  6. — Translucent  tears,  strong  asafetida  odor  70.9. 
No.  7. — Resin  from  No.  6  treated  same  as  No.  3,  90.2,  S89.4. 
No.  8. — Ammoniac  tears  74.2,  S80.5. 
No.  9. — Tears  yellow  surface,  fracture  smooth,  turning  red. 
Four  portions  of  the  purified  resin  were  dried  and  assayed  as  fol- 
lows .  The  figures  are  duplicate  determinations  of  the  lead  in  the 
solutions : 
Dried  5  hours  at  no°C.  235.3  S231.3 
Dried  10  hours  at  no°C.  206.4  S207.0 
Dried  20  hours  at  no°C.  221.9  S226.6 
Dried  25  hours  at  no°C.    S201.0 
No.  10. — A  quantity  of  the  purified  resin  used  in  No.  9  was 
dissolved  in  alcohol,  25  c.c.  of  the  solution  representing  about  1.1 
gm.  transferred  to  a  tared,  beaker,  the  alcohol  evaporated  and  the 
resin  dried  for  5  hours  at  no°  C,  and  from  this,  the  amount  of 
resin  calculated  in  the  solution.  The  lead  number  of  the  resin 
dried  at  no°  C  was  determined  and  also  2 — 25  c.c.  and  1 — 15  c.c 
portions  of  the  solution  with  the  following  results : 
A        25  Cc.  solution  lead  number  223.5 
B        25  Cc.  solution  lead  number  232.1 
C         15  Cc.  solution  lead  number  250.7 
D        25  Cc.  solution        evaporated  and         lead  number  237.1 
dried  at  no° 
No.  11. — About  2y2  gms.  of  the  purified  resin  as  used  in  ex- 
periment No.  9  was  dried  for  5  hours  at  no°,  cooled  and  weighed, 
dissolved  in  alcohol  and  made  up  to  60  c.c.  2 — 25  c.c.  portions  were 
assayed  for  lead  number  with  the  following  results, — A  272.7. 
B  268.1. 
No.  12. — A  sample  of  purified  asafetida  resin  prepared  by  Dr. 
Seil  was  examined  as  follows :  Four  assays  were  made.  Duplicate 
determinations  of  lead  in  each  solution  were  made.  a.  b.  The 
crucibles  were  dried  to  constant  weight  at  no°  C,  cooled  and 
weighed,  then  ignited  over  a  Meker  burner  for  about  5  minutes, 
cooled  and  weighed.  Weights  are  given  after  drying  and  after 
ignition  and  lead  number  calculated  for  each. 
Duplicates  on  blank,  assay  2,  after  drying  0.1662  and  0.1655  gm. 
PbS04;  after  ignition  0.1603  and  0.1600  gm.   Duplicate  on  solution 
