NEW  ALKALOID  FOUND  IN  ACONITUM  NAPELLUS.  179 
was  0*89  gramme.  Consequently  1  part  of  aconella  dissolves  in 
0°6  parts  by  weight  of  boiling  spirit,  or  11*4  by  measure. 
The  same  experiment  was  made  with  narcotina,  and  it  will  be 
observed  that  the  two  bodies  give  the  same  solubility  almost  to  a 
nicety.  The  narcotina  and  spirit  in  specific-gravity  bottle 
weighed  9*55  grammes.  The  weight  of  crystallized  narcotina 
was  0-90  gramme.  The  equivalent  of  aconella  determined  by 
calculations  from  data  obtained  by  experiment  is  almost  exactly 
that  of  narcotina. 
Platinum  obtained.   Percentage     Average  ot 
Grammes.         Grammes.       of  Platinum.  Platinum 
Weight  of  chloride  of  plati-  (  3-085  0-465  =  15  ] 
num  and  aconella  manipu-^  0-5^0  0*075  =  15  >  15*66 
latedupon.  { 0-500.....  0-085  =  17  j 
Aver,  of  Pt.   Comp.  Pt. 
Therefore  15-66  :  100  ::  99  :  x  =  equiv.  of  compound.  5c=632  18 
We  thus  obtain  632*18  as  the  equivalent  of  the  double 
chloride. 
As  three  equivalents  of  chlorine,  one  of  platinum,  and  one  of 
aconella  make  up  the  compound,  the  equivalent  of  aconella  alone 
is  obtained  by  deducting  from  the  whole  the  chlorine  and  plati- 
num. 
ci.  Pt. 
35-5    +    3  =  106-5    -f    99  =  205-5 
Deducting  this  sum  from  632*18,  we  have  426*68  left  as  the 
equivalent  of  aconella. 
Narcotina,  C46H25NO14,  has  as  its  equivalent  427,  a  number  so 
close  to  the  calculated  equivalent  of  aconella,  that  it  seems  to 
change  to  reality  the  supposition  of  these  two  alkaloids  being 
one  and  the  same,  though  obtained  from  plants  belonging  to  dif- 
ferent Natural  Orders. — Lond.  Pharm.  Jour.^  Jan.,  1863. 
Edinburgh,  18th  December,  1863.. 
