478 
Alcohol  in  Titration  of  Alkaloids.  {^i^J^t 
After  addition  of  5  c.c.  of  alcohol  to  10  c.c.  of  the  diluted  alcohol 
solution,  the  following  results  were  obtained  : 
Per  Cent. 
With  hematoxylin  92*84 
With  tropaeolin  00,  requiring  the  addition  of  3*2  e.c.  ^  H^SO^,  106*65 
ATROPINE. 
Indicator. 
Hematoxylin 
Cochineal  .  . 
Brazil  wood  . 
Tropseolin  OO 
Lacmoid .  .  . 
LUmus    .  .  . 
Water  Solution. 
Diluted  Alcohol 
Solution. 
Per  Cent. 
Per  Cent. 
9989 
96-82 
100  08 
97-33 
9975 
94-62 
I00-02 
io5-58 
100*38 
97-95 
98-20 
91-49 
In  the  case  of  tropceolin  the  diluted  alcohol  solution  required  the 
addition  of  1-5 2  c.c.  ~  H2S04  before  a  decidedly  acid  color  was 
obtained  and  satisfactory  titration  made  possible. 
After  addition  of  5  c.c.  of  alcohol  to  10  c.c.  of  the  diluted  alcohol 
solution,  the  following  results  were  obtained  : 
Per  Cent. 
With  hematoxylin  92'95 
With  tropaeolin  OO,  requiring  the  addition  of  3-2  c.c.  ^  H2S04,  108-09 
STRYCHNINE. 
Indicator. 
Hsematoxylin 
Cochineal  .  . 
Brazil  wood  . 
Tropaeolin  00 
Lacmoid .  .  . 
Litmus    .  .  . 
Water  Solution. 
Diluted  Alcohol 
Solution. 
Per  Cent. 
Per  Cent. 
97-03 
94'59 
97*43 
94-25 
96-53 
89*11 
97-19 
103-54 
98-03 
97-19 
92-11 
84-03 
