460 
Ccda?'  Gum. 
Am.  Jour.  Pharm 
Sept.,  1890. 
from  color  it  would  be  a  valuable  commodity  if  obtainable  in  any 
quantity.    An  analysis  gave  the  following  result : 
Here  we  have  a  true  gum,  without  so  much  as  a  trace  of  resin. 
Following  is  the  evidence  the  author  has  been  able  to  collect  in 
regard  to  the  exudation  of  the  Indian  tree. 
"  It  yields  a  resinous  gum"  (Cat.  Kew  Museums).  Perhaps  the 
experiments  of  von  Esenbeck  (infra)  are  the  foundation  for  this 
statement. 
"  It  is  called  bastard  cedar  from  an  aromatic  (sic)  resin  exuding 
from  it,  resembling  that  of  the  American  cedar"  (Art.  Cedrela 
Toona  in  Surgeon-General  Balfour's  '  Cyclop,  of  India').  No  definite 
authority  is  given  for  this  statement,  and  the  writer  is  probably 
laboring  under  a  misapprehension,  as  the  name  cedar  was  bestowed 
in  reference  to  the  wood,  and  not  to  any  exudation. 
The  experiments  of  Nees  von  Esenbeck,  who  extracted  from  the 
bark  a  resinous  astringent  matter,  and  a  brown  astringent  gum,  do 
not  affect  the  point  at  issue  one  way  or  the  other. 
"  Toon-ke-gond  "  (C.  Toona)  is  enumerated  by  Dr.  Wight  as  one 
of  the  gums  of  Coimbatore..  Yet  Cooke  (<  Gums  and  Resins  of 
India'),  who  quotes  this  statement,  says,  "  From  the  character  of 
the  timber  one  might  suppose  it  rather  a  resin  than  a  gum."  I  am 
not  impressed  with  the  force  of  the  latter  observation. 
A  sample  of  "  Toon-ke-gond,"  the  exudation  of  C.  Toona,  was 
exhibited  by  Dr.  Royle  at  the  exhibition  of  185 1  (No.  52,  p.  180, 
Jury  reports).  It  is  not  definitely  stated  whether  it  is  a  gum  or  a 
resin,  and  there  is  nothing  in  the  context  to  clear  up  the  point 
absolutely. 
Dragendorff  ('  Pflanzenanalyse,'  Greenish's  Trans.,  p.  212)  speaks 
of  "  the  partially  soluble  gum  of  species  of  *  *  *  Cedrela!'  To 
this  specific  statement  of  a  man  who  only  employs  the  term  "gum" 
in  its  proper  significance,  I  attach  much  importance. 
I  consider  the  balance  of  probability  to  be  largely  in  favor  of  the 
exudation  from  the  Indian  species  being  a  gum  and  not  a  resin.  As 
collateral  evidence,  the  exudations  from  the  Indian  Melia  Azadirachta, 
Linn,  (another  of  the  " Chittagong  woods"),  and  the  Australian 
Arabin,  
Metarabin,  
Hygroscopic  moisture, 
Ash,  
68-3 
6-3 
•19*54 
5'i6 
