422 
CINCHONA  CULTIVATION  IN  BENGAL. 
the  mixture  from  the  fire  altogether  ;  and  when  it  begins  to 
stiffen,  add  the  mercurial  solution,  and  mix  thoroughly. — The 
Pharmacist^  Chicago,  July,  1870. 
REPORT  ON  CINCHONA  CULTIVATION  IN  BENGAL. 
From  C.  B.  Clarke,  Esq.,  M.A.,  Officiating  Superintendent,  Botanic 
Garden,  and  in  charge  of  Cinchona  cultivation  in  Bengal^  to  the  Secre- 
tary to  the  Government  of  Bengal, — [No.  188,  dated  Botanic  Garden, 
Calcutta,  the  2m  April,  1870). 
Sir, — I  beg  leave  to  submit  the  annual  report  on  the  cultiva- 
tion of  Cinchona  in  Bengal  for  the  year  ending  31st  March, 
1870. 
2.  The  three  species  of  cinchona  of  which  the  cultivation  has 
been  extended  during  the  year  are  C.  sueciruhra,  0.  officinalis, 
and  C.  calisaya. 
The  number  of  plants  of  these  species  in  permanent  planta- 
tions were  as  under  : — 
C.  succiruhra. 
C.  officinalis. 
C.  calisaya. 
March  31,  1869 
615,730 
312,719 
220 
March  31,  1870 
1,055,100 
406,8j9 
4,000 
Increase 
439,370 
91,180 
3,780 
3.  The  increase  of  permanent  plantation  of  C.  succiruhra  and 
C.  calisaya  has  been  made  about  Rishap  at  an  elevation  of  2500 
feet ;  the  increase  of  0.  officinalis  at  Rungbee  at  an  elevation  of 
about  4500  feet. 
4.  The  average  growth  for  the  year  of  the  ten  measured  plants 
of  C.  succiruhra  planted  in  March,  1867,  at  Rishap,  has  been  51 
inches,  which  fairly  represents  the  satisfactory  general  growth 
of  the  C.  succiruhra  plantations. 
5.  The  average  growth  for  the  year  of  the  ten  measured  plants 
of  0.  officinalis  planted  in  October,  1864,  at  Rungbee,  has  been 
12  inches,  which  fairly  represents  the  unsatisfactory  general 
growth  of  the  C.  officinalis  plantations. 
