324         RESEARCHES  ON  THE  CONSTITUTION  OF  QUINIA. 
0-6213  grm.  of  this  anhydrous  salt  decomposed  to  04830  grm. 
sulphate  of  barytes,  corresponding  with  10-1  per  cent,  sulphuric 
acid. 
Its  formula  is  therefore  C44  H29  N2  05,  S03-f  8HO,  which  con- 
tains 10-0  per  cent,  sulphuric  acid  in  the  dry  salt,  and  15-2  per 
cent,  water  of  crystallization. 
Chloride  of  ethyle-quinine. — When  hydrochloric  acid  is  added 
to  the  solution  of  ethyle-quinine  in  water,  and  this  evaporated  in 
the  air,  a  syrup  results,  in  which,  after  a  long  time,  thin  needles 
are  formed.  But  when  a  concentrated  solution  of  chloride  of 
sodium  is  added  to  ethyle-quinine,  very  soon  needles  are  sepa- 
rated very  much  resembling  those  of  the  corresponding  iodide. 
The  best  way  to  obtain  them  is  to  concentrate  a  solution  of  the 
nitrate  (which  does  not  crystallize,  and  is  made  by  precipitating 
the  iodide  with  nitrate  of  silver  and  filtering)  and  mix  it  with  a 
concentrated  solution  of  chloride  of  sodium.  The  needles  are 
fine,  combined  to  semi-spheroidal  masses,  which  are  to  be  re- 
crystallized  from  boiling  water ;  they  are  less  soluble  in  cold 
water,  neutral,  and  of  the  behaviour  of  the  iodide.  After  being 
dried  at  120°  C,  from  0-4830  grm.  was  obtained  0-1785  grm. 
chloride  of  silver,  or  9-1  per  cent,  chlorine,  which  corresponds 
with  C4t  H23  N2  04  CI,  containing  9-1  per  cent,  chlorine. 
The  solution  of  ethyle-quinine  mixed  with  hydrochloric  acid, 
gives  with  chloride  of  platinum  a  yellow  precipitate,  soluble  in 
boiling  water,  from  which  it  crystallizes  indistinctly. 
0*3380  grm.  of  this  double  salt,  when  dried  at  110°,  yielded 
0*0860  grm.  platinum,  or  25-4  per  cent. 
The  formula  C44  H29  N2  04  Cl+H  Cl+2Pt  Cl2  demands  25-8 
per  cent. 
The  properties  of  ethyle-quinine  and  its  combinations,  show  it 
to  belong  to  that  class  of  bases  which  are  usually  termed  ammo- 
nium bases,  sufficiently  characterized  by  their  strong  alkaline 
properties,  and  the  chlorides  and  iodides  of  which  are  not  decom- 
posable by  potassa.  The  four  equivalents  of  hydrogen  of  the 
ammonium  are  in  these  bases  replaced  by  four  organic  radicals. 
Moreover,  I  have  satisfied  myself  that  ethyle-quinine  does  not 
contain  another  equivalent  of  hydrogen  which  might  be  replaced 
by  ethyle ;  for  a  concentrated  alcoholic  solution  of  it  does  not 
