NOTE  ON  SOLANINE,  AND  ITS  DERIVATIONS.  329 
tion  which  we  made  at  the  Faculty  of  Sciences  of  Montpellier  in 
the  laboratory  of  Professor  Chancel. 
Several  species  of  the  genus  Solanum  (S.  nigrum,  S.  dulca- 
mara, S.  tuberosum,  $c.,)  furnish  alkaloids,  which  are  generally 
considered  as  identical ;  we  have  not  yet  been  able  to  compare 
these  various  substances  analytically,  but  we  may  affirm  that  in 
their  physical  characters  they  differ  perceptibly  from  each  other, 
and  in  the  confusion  of  these  various  products  might  exist  the 
cause  of  the  different  formulae,  which  have  been  assigned  to 
solanine.  Our  present  paper  relates  to  the  alkaloid  of  the  dul- 
camara. The  following  is  the  result  of  several  analyses  of  this 
substance : — 
Carbon  .  .  60-73  60-73  60  91 
Hydrogen  .  8-43  8-39  8  69 
Nitrogen         .  "  "  "  3-61 
These  numbers  enable  us  to  establish  the  following  formula  :• — 
C42  H35  NO14, 
which  agrees  very  well  with  calculation  : — 
Calculation.  Experiment. 
C42=252  61-0  60-91 
H35=  35                    8-5  8-69 
N  —  14                    34  3-61 
014=112  27-1  26-79 
100-0  100-00 
M.  Blanchet  has  arrived  at  a  very  different  formula  : — - 
C84  H68  NO28. 
According  to  him,  this  alkaloid  would  contain  per  cent.- 
Carbon   62-0 
Hydrogen       .....  8-9 
Nitrogen  .       .       .       .       .       .  1-6 
Oxygen    27-5 
100-0 
M.  O.  Henry  has  arrived  at  the  following  composition 
C  =75-00  ;  H=9.14  ;  N=3-08  ;  0=12-78, 
