168 
CHEMICAL  COMPOSITION  OF  QUINIDINE. 
Found.  Calculated. 
I.  II.  III.  IV.  v. 
Carbon,      34.77    ..—    ..     —     ..     —    ..  —    ..  3152 
Hydrogen,    4.01    .  .  —     .  .     —     .  .     —     .  .  —    .  .  3.3& 
Quicksilver,  —      .  .  31.98  .  .  31.91    .  .     —    .  .  —   .  .  31.97 
Chlorine,      —      .  .    —    .  .     —     .  .   22.60  .  .  22.31 .  .  22.63 
Corresponding  formula : 
C36  H22  N2  02l  2  CI,  2  Hg  CI. 
Nitrate  of  Quinidine. — If  pure  quinidine  be  dissolved  by  the 
aid  of  heat  in  moderately  diluted  nitric  acid  until  the  solution  is 
neutral  to  test-paper,  and  the  strongly  opalizing  mixture  evaporated 
over  sulphuric  acid,  the  nitrate  of  quinidine  crystallizes  aftersome 
time  in  beautiful  large  warty  crusts,  resembling  enamel.  If  the 
mother  liquor  be  allowed  further  to  evaporate,  a  hemispherical 
white  mass,  resembling  wax,  forms  on  the  surface,  whilst  the 
liquid  becomes  slightly  green.  This  salt  readily  dissolves  in 
water. 
Chlorate  of  Quinidine. — By  the  mutual  decomposition  of 
neutral  sulphate  of  quinidine  and  chlorate  of  potash,  this  salt 
was  obtained  in  a  perfectly  pure  state  after  having  been  re- 
crystallized  from  alcohol  of  90  per  cent.  It  forms  long,  white  silky 
prisms  grouped  in  tufts.  By  a  gentle  heat  it  fuses  into  a  transparent 
mass,  but  explodes  very  violently  at  a  higher  temperature. 
Hyposulphite  of  Quinidine. — It  was  obtained  by  the  mutual  de- 
composition of  neutral  sulphate  of  quinidine  and  hyposulphite  of 
soda.  When  the  solution  cools,  the  hyposulphite  of  quinidine 
crystallizes  in  thin,  long,  asbestos-like  needles.  In  water  this 
salt  dissolves  with  some  difficulty,  but  is  very  soluble  in  ether. 
Fluate  of  Quinidine — Pure  quinidine  in  fine  powder  was  sus- 
pended in  water  and  placed  in  an  apparatus  for  the  developement  of 
fluoric'acid  ;  after  some  time,  the  quinidine  contained  in  the  water 
entirely  dissolved,  and  a  clear,  intensely  acid,  slightly  opalizing 
liquid  was  obtained.  The  solution  was  left  to  spontaneous  evapo- 
ration, and  yielded  a  mass  of  fluate  of  quinidine,  consisting  of 
white,  silk-like  crystalline  needles,  which  dissolved  with  great  rea- 
diness in  water.  Upon  the  addition  of  chloride  of  calcium  apreci- 
tate  was  formed,  which  was  insoluble  in  acetic  acid. 
Acetate  of  Quinine. — This  compound  is  obtained  by  dissolving 
