Am.  Jour.  Pharm.1 
November,  1907.  J 
Poison  Sumac. 
517 
but  the  results  were  not  always  concordant,  although  great  care  was 
used.  This,  together  with  the  great  variation  in  the  saponification 
numbers  and  the  variable  amounts  of  insoluble  matter  produced  by 
saponification,  would  indicate  that  the  poisonous  substance  is  a 
complex  mixture  rather  than  an  isolated  compound. 
The  following  results  were  obtained  by  combustion  : 
PORTION  SOLUBLE  IN  BENZIN  WHEN  SHAKEN  WITH  ALCOHOL. 
I. 
0*2574  gramme  gave  0*2187  gramme  H20  and  07192  gramme  C02. 
II. 
°"2747  gramme  gave  ©"2344  gramme  H20  and  07659  gramme  C02. 
I. 
0*4716  gramme  gave  5*2  c.c.  N  at  210  C.  and  738  mm. 
II. 
0*4282  gramme  gave  4*8  c.c.  N  at  200  C.  and  732  mm. 
I.  II.  Mean. 
Per  Cent.  Per  Cent.  Per  Cent. 
Hydrogen  9*461  9*544  9*502 
Carbon  76*203  76*040  76*122 
Nitrogen  \  i*ioi  1*105  1*103 
Portion  dissolved  by  85  per  cent,  alcohol  when  shaken  with 
benzin. 
\  L 
0*2833  gramme  gave  0*2424  gramme  H20  and  0*8116  gramme  C02. 
II. 
0*2499  gramme  gave  0*2152  gramme  H20  and  0*7182  gramme  C02. 
I. 
0*4645  gramme  gave  5*1  c.c.  N  at  20*5°  C.  and  743  mm. 
II. 
0*4608  gramme  gave  5*2  c.c.  N  at  21*5°  C.  and  738  mm. 
I.  II.  Mean. 
Per  Cent.  Per  Cent.  Per  Cent. 
Hydrogen  9*571  9*632  9*601 
Carbon  78*131  78*380  78*255 
Nitrogen  1*104  1*124  1*114 
Combustion  of  the  acetyl  derivative  from  the  portion  soluble  in 
85  per  cent,  alcohol. 
I. 
0*2738  gramme  gave  0*2043  gramme  H20  and  0*7207  gramme  C02. 
II. 
0*2609  gramme  gave  0*1923  gramme  H20  and  0*6819  gramme  C02. 
