168         ON  PAPYRUS,  BONAPARTEA,  AND  OTHER  PLANTS. 
ing  corrosive  sublimate.  These  last  plans  have  their  advantages, 
but  are,  I  believe,  inferior  to  the  following,  which  is  recommend- 
ed for  its  simplicity  and  readiness. 
In  place  of  paper,  take  a  little  band  of  adhesive  plaster,  write 
on  its  back  as  though  it  were  paper.  If  the  plaster  is  soft,  the 
band  will  stick  without  heating,  otherwise  it  should  be  gently 
heated ;  and  the  durability  of  the  label  is  augmented  when  the 
plaster  by  this  means  is  made  to  penetrate  the  material  upon 
which  it  is  spread. 
I  presented  to  the  Society  of  Pharmacy  on  the  6th  of  June, 
1855,  several  specimens,  which  had  been  in  the  cellar  since  the 
1st  of  June,  1851,  without  being  disturbed.  Though  covered 
with  mould,  this  was  readily  removed  by  a  brush,  and  the  writ- 
ing left  perfectly  legible. 
A  label  of  this  kind  was  kept  under  water  without  the  tissue 
being  altered,  although  it  is  loosened  and  the  writing  rendered 
paler.  The  latter  inconvenience  is  overcome  by  using,  in  place 
of  ordinary  ink,  a  varnish  colored  with  Chinese  vermillion.  The 
use  of  these  labels  is  not  new,  as  they  have  been  in  use  in  the 
hospitals  for  ten  years  past. — Repertoire  de  Pharm.  July,  1855. 
ON  PAPYRUS,  BONAPARTEA,  AND  OTHER  PLANTS  WHICH 
CAN  FURNISH  FIBRE  FOR  PAPER  PULP; 
By  Chevalier  De  Claussen. 
The  paper-makers  are  in  want  of  a  material  to  replace  rags  in 
the  manufacture  of  paper,  and  I  have  therefore  turned  my  at- 
tention to  this  subject,  the  result  of  which  I  will  communicate  to 
the  Association.  To  make  this  matter  more  comprehensible,  I 
will  explain  what  the  paper-makers  want.  They  require  a  cheap 
material,  with  a  strong  fibre,  easily  bleached,  and  of  which  an 
unlimited  supply  may  be  obtained.  I  will  now  enumerate  a  few 
of  the  different  substances  which  I  have  examined  for  the  purpose 
of  discovering  a  proper  substitute  for  rags.  Rags  containing 
about  50  per  cent,  of  vegetable  fibre  mixed  with  wool  or  silk  are 
regarded  by  the  paper  makers  as  useless  to  them,  and  several 
thousand  tons  are  yearly  burned  in  the  manufacture  of  prussiate 
of  potash.    By  a  simple  process,  which  consists  in  boiling  these 
