THE  AMERICAN 
JOURNAL  OF  PHARMACY 
OCTOBER,  i8gy. 
THE  TANNIN  OF  CERIOPS  CANDOLLEANA. 
By  Henry  Trimble. 
Contribution  from  the  Chemical  Laboratory  of  the  Philadelphia  College  of 
Pharmacy.    No.  170. 
Having  received  two  samples  of  the  bark  from  this  member  of 
the  mangrove  group,  which  had  been  collected  in  widely  separated 
localities  in  India,  it  was  thought  that  an  investigation  of  the  princi- 
pal constituent,  tannin,  might  prove  of  interest. 
One  sample  was  received  from  A.  E.  Wild,  Conservator  of  Forests, 
Bengal ;  it  was  collected  in  that  locality  in  February.  The  other 
sample  was  sent  from  Singapore,  and  was  collected  there  in  Novem- 
ber ;  it  was  forwarded  to  me  by  H.  N.  Ridley,  of  the  Botanic 
Gardens  at  that  place.1 
Ceriops  Candolleana,  like  many  other  members  of  the  Rhizo- 
poraceae,  is  found  in  nearly  all  the  low  muddy  shores  of  India,  and 
the  Andaman  Islands.  It  is  known  under  the  vernacular  names  of 
Kirrari,  Goran,  Mada  and  Tengah,  according  to  the  locality  in 
which  it  grows.  It  is  a  small,  evergreen  tree,  with  dark  red  bark 
and  hard  red  wood.  The  pores  of  the  wood  are  very  small,  and 
the  medullary  rays  very  fine,  slightly  wavy  and  equidistant.  Pores 
joined  by  fine,  wavy,  interrupted,  concentric  bands. 
The  bark  is  of  a  deep  reddish-brown  color,  and  is  covered  on  the 
outer  surface  with  numerous  conspicuous  lenticels.     It  yields  a 
1  To  both  Mr.  Wild  and  Mr.  Ridley  the  author  is  under  obligations  for  other 
valuable  samples. 
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