446 
RESTORATION  OF  PICTURES. 
Ogden),  which  will  be  found  to  remain  combined  and  to  mix 
readily  with  either  spirit  or  water  : 
Take  of  Chloroform  3iv. 
Ether  3iss. 
Oil  of  Peppermint  gtt.  viij. 
Eesin  of  Cannabis  gr.  xvj. 
Capsicum  gr.  ij. 
Macerate  for  two  or  three  days  and  filter.    (No.  1). 
Then  take  of  Muriate  of  Morphia  gr.  xvj. 
Hydrocyanic  Acid  Sch.  "I  xcvj. 
Perchloric  Acid. 
Water  aa  3ss. 
Syrup  of  treacle  (or  honey),  to  make  in  all  4  oz. 
Dissolve  the  muriate  of  morphia  in  about  an  ounce  of  syrup, 
to  which  has  been  added  the  perchloric  acid  and  water,  assist- 
ing solution  by  a  water-bath,  and  when  cold  add  the  prussic 
acid. 
Here,  as  it  is  absolutely  necessary  to  preserve  the  relative 
proportions  of  these  potent  medicines,  and  also  to  include  them 
in  a  given  bulk,  the  manipulation  is  not  so  easy.  It  is  only  to 
be  done,  so  it  appears  to  me,  by  balancing  separately  the  chlo- 
roformic  tincture  with  the  morphia  syrup,  and  then  again  with 
a  plain  syrup  to  be  used  in  making  up  the  exact  measure  of  the 
completed  article.  The  balancing  must  be  effected  by  adding 
water  guttatim  to  a  syrup  denser  than  necessary.  Then  having 
ascertained  by  the  balance  the  proportions  required,  quantities 
of  the  same  materials,  no  matter  how  great,  can  at  once  be 
adapted  for  use  without  further  trouble. 
My  chief  object  in  giving  the  details  of  this  process  is  to 
enable  prescribers  to  devise  for  themselves,  if  they  think  fit,  a 
form  of  the  exact  composition  of  which  they  are  aware — an  all- 
important  requirement,  one  would  imagine,  where  remedies  of 
great  potency  are  to  be  administered. — London  Pharm.  Journ., 
June  1,  1864. 
RESTORATION  OF  PICTURES. 
Professor  Pettenkofer,  of  Munich,  who,  it  may  be  remem- 
bered; has  invented  a  method  for  restoring  pictures,  has  just 
