Am.  Jour.  Pharm.  1 
June,  1886.  / 
Eucalyptus  Products 
305 
having  probabl}!'  led  to  the  erroneous  description  of  Savanilla  rhatany 
in  the  Pharmacopoeia,  where  it  is  stated  to  be  of  a  dark  purplish  or 
violet  color,  whereas  Savanilla  rhatany  has  a  pale  or  dull  purplish- 
brown  tint.    The  latter  is  the  kind  referred  to  in  Dr.  Paul's  analysis. 
The  Guayaquil  rhatany,  therefore,  evidently  possesses  powerfully 
astringent  properties,  and  might  be  made  available  for  tooth  tinctures, 
and  might  possibly  be  turned  to  account  in  tanning. 
I  may  take  this  opportunity  of  acknowledging  my  indebtedness  to 
Messrs.  Jenkin  and  Phillips,  who  have  kindly  presented  specimens  of 
the  root  to  the  Museum  of  this  Society,  together  with  a  sufficient  quan- 
tity for  the  chemical  examination  made  by  Dr.  Paul.  Mr.  Philips 
informs  me  that  this  kind  of  rhatany  appeared  in  the  London  market 
for  the  first  time  this  month,  and  that  only  four  bales  of  it  were  offered. 
— Phar.  Jour,  and  Trans.,  April  17,  p.  878. 
EUCALYPTUS  PRODUCTS. 
(Concluded  from  page  183.) 
Eucalyptus  Kino. — An  astringent  exudation  occurs  in  most  species 
of  eucalyptus,  filling  cavities  or  cracks  in  the  wood  and  barks ;  when 
dry  it  is  brittle  and  presents  an  appearance  similar  to  Indian  kino. 
It  varies  greatly  in  different  species,  both  in  quantity  and  in  character. 
According  to  Wiesner  it  consists  of  a  mixture  of  tannic  acid,  giving 
a  dirty  green  precipitate  with  solutions  of  ferric  salts,  pyrocatechin, 
a  little  catechin,  and  a  very  variable  quantity  of  a  substance  insolu- 
ble in  water,  but  soluble  in  alcohol,  and  which  has  been  variously 
described  as  gum  resin,  kino-red,  or  eucalyptus-red. 
The  amount  of  the  astringent  exudation  afforded  by  different  species 
may  be  seen  from  the  following  table  : 
Per  cent.   Per  cent. 
E.  leucoxylon   21*94 
E.  macrorhyncha   11*12  to  13*41 
E.  longifolia   8*3 
E.  rostrata   8'22 
E.  viminalis   4*88  to  5*97 
E.  globulus     4*84  to  5*97  . 
E.  resinifera.   4*38 
E.  goniocalyx   4*12  to  4*62 
E.  melliodora...   4*03 
E.  obliqua   2'50  to  4\L9' 
E.  polyanthema     3'97 
E.  Gunnii   3*44 
E.  amygdalina   3  22  to  3'40 
20 
