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360  ON  THE  CINCHONA  BARKS  OF  NEW  GRANADA. 
ON  THE  CINCHONA  BARKS  OF  NEW  GRANADA. 
By  Ezequiel  Uricoechea,  of  Bogota. 
The  increasing  commerce  in  the  Cinchona  barks  of  New 
Granada,  and  a  desire  to  contribute  something  to  the  knowledge 
of  them,  are  my  reasons  for  writing  these  lines. 
Much  has  been  lately  said  ofthe  Bogota,  Cinchona  bark  (Chin  a 
Bogotensis,}  in  which  the  new  base  quinidine  has  been  found. 
As  the  new  alkaloid  differs  from  quinine,  and  was  thought  to  be 
much  inferior  to  it  in  medicinal  properties,  there  was  a  check  on 
the  commerce  in  the  Cinchona  barks  coming  from  New  Granada, 
all  of  them  passing  under  the  name  of  China  Bogotensis  ;  more 
recently,  however,  considerable  quantities  have  been  exported  to 
England.  That  the  barks  which  now  come  from  that  country 
differ  from  one  another,  I  hope  to  show  in  what  follows,  for  of 
the  old  cinchona  trees  from  New  Granada,  it  is  too  well  known 
that  there  were  a  great  many  species,  the  barks  of  which  were 
then  exported. 
Having  received  by  private  means,  and  not  through  a  mercan- 
tile house,  seven  specimens  of  bark  direct  from  Bogota,  Professor 
Wiggers,  of  Gottingen,  had  the  kindness  to  examine  them  ;  and 
as  I  have  had  the  opportunity  of  comparing  them  with  other 
known  specimens  in  his  possession,  I  entertain  no  doubt  of  the 
correctness  of  his  determination. 
In  addition  to  the  barks  I  obtained  an  ounce  of  the  sulphate 
of  quinine  made  by  Manuel  Umana  and  Co.,  in  the  Tequendama 
manufactory,  regarding  a  qualitative  analysis  of  which  I  may  be 
permitted  a  few  lines. 
1.  China  pseudoregia.  From  Chipaque,  sixteen  leagues  from 
Bogota.  There  are  some  seven  subordinate  barks  that*come  un- 
der this  name.  According  to  Reichel's  analysis  it  contains  per 
cent. — quinine,  1.01,  cinchonine,  0.63,quinic  acid,  1.29. 
2.  China  flava  dura.  From  Suaque,  ten  leagues  from  Bogota. 
This  cinchona  contains,  according  to  Pelletier  and  Caventou,  the 
discoverers  of  quinine,  and  to  whom  we  owe  the  first  scientific 
investigations  of  these  barks,  quinate  of  quinine  and  of  cinchonine. 
3.  China  Cartagena.  From  Chipaque.  Here  we  see,  that  in 
the  same  place  there  are  two  kinds  of  bark  collected — this  and 
the  pseudoregia  ;  and  probably  in  the  woods  trees  of  very  differ- 
