Am.  Jour.  Pharni. 
Oct.,  1884. 
Estimation  of  Nicotine. 
501 
Volume  of  Nicotine 
Solution. 
fA. 
1.  40  cc. 
2.  40  cc. 
3.  20  cc 
4.  20  cc 
5.  20  cc 
6.  20  cc 
7.  20  cc 
8.  20  cc 
Amount 
of 
Nicotine. 
•3148 
•3148 
•1574 
•1574 
•1574 
■1574 
•1574 
•1574 
Quantity 
of  M.S. 
required. 
7  cc. 
3  cc, 
3  cc. 
■5  cc. 
•2  cc. 
25  cc. 
3  cc. 
25  cc. 
Weight 
of 
Precipitate. 
Average  for  20  cc.  of  Nicotine  Solut, 
B.  a. 
20  cc  
20  cc  
B.  b. 
1.  20  cc  
2.  20  cc  
3.  20  cc  
Average  for  20  cc   22 
B.  c. 
•1866 
•1866 
•1866 
22 
I  22' 
22 
22' 
22- 
3  cc. 
6  cc. 
4  cc. 
6  cc. 
7  cc. 
4  cc 
5  cc. 
1*461 
1-442 
0-718 
0-727 
0-723 
0-718 
0-724 
0-862 
0-870 
0-871 
0-862 
20  cc  I 
17-4  cc. 
0-866 
0  -645 
Liquid  off  Precipitate. 
Amount  Amount 
of  Hg  as  HgS.      of  I. 
0-052 
0*055 
0-027 
0-028 
0-027 
0-027 
0*026 
0-028 
Composition  of  Precipitate. 
1-000  of  A.  2.  yielded  0-270  HgS  and  1-085  Agl  =  0*586  I. 
0-718  of  A.  3.      "     0-197  HgS  and  0-773  Agl  =  0*418  I. 
0-723  of  A.  7.      "     0-197  HgS  and  0-785  Agl  =  0-424  I. 
0-197  HgS  correspond  to  0*385  Hgl2  with  0-215  I. 
0*385  Hgl2  deducted  from  the  precipitate,  that  is  from  0*723,  leaves 
0*338  for  acid  hydriodide  nicotine. 
0*215  I  deducted  from  the  entire  amount  of  1  found  in  precipitate, 
from  0*424,  leaves  0*209  I,  which  is  as  HI  in  combination  with 
nicotine. 
0*723  precipitate  give  by  calculation  0*376  Hgl2  and  0*347 
AoHuN2(HI)2  with  0*210  I. 
0*755  of  precipitate  B.  b.  2.  yielded  0*205  HgS  and  0*820  Agl,  or 
