AF;bJruSy,Pih9ir9m^      Cold  Process  for  Official  Soaps.  85 
glass,  add  a  solution  of  the  sodium  hydroxide  in  25  milliliters  of 
water.  To  this  mixture  add  25  milliliters  of  alcohol  and  agitate 
the  contents  of  the  vessel  until  saponification  is  complete  and  the 
mass  becomes  clear,  gelatinous  and  semi-solid.  Let  stand  one  hour 
or  longer.  Dissolve  the  camphor  and  oil  of  rosemary  in  675  milli- 
liters of  alcohol,  add  to  the  soap  just  prepared,  and,  if  necessary, 
add  sufficient  water  to  make  the  finished  product  measure  1,000 
milliliters.    Finally  mix  thoroughly. 
Liquor  Cresolis  Compositus.    Compound  Solution  of  Cresol. 
The  official  preparation  is  a  fifty  per  cent,  solution  of  cresol  in 
a  liquid  consisting  of  soap,  water  and  alcohol.  The  considerable 
excess  of  alkali  seems  unnecessary  and  the  alcohol  may  be  dis- 
pensed with  as  serving  no  useful  purpose.  The  process  below  is 
offered  as  one  in  every  way  satisfactory  both  from  a  standpoint  of 
economy  in  labor  and  materials  and  superiority  of  the  finished  pro- 
duct. This  preparation  forms  brilliantly  clear  solutions  with  water 
in  all  proportions. 
Cresol    500  Gm. 
Sodium  hydroxide   40  Gm. 
Linseed  oil   300  Gm. 
Water  a  sufficient  quantity  to  make    1,000  Gm. 
To  the  sodium  hydroxide,  which  must  be  of  full  strength,  con- 
tained in  a  suitable  tared  vessel,  add  150  milliliters  of  water  and 
stir  until  solution  has  been  effected.  While  still  hot,  in  a  thin  stream 
and  under  constant  stirring,  add  the  linseed  oil.  Continue  the 
stirring  until  the  mass  acquires  the  appearance  and  consistence  of 
an  emulsion  and  set  aside,  without  further  stirring,  for  twelve  hours 
or  over  night.  To  the  soap  thus  formed  add  the  cresol  and  suffi- 
cient water  to  make  the  finished  product  weigh  1,000  grams  and 
stir  the  mixture  until  complete  solution  has  been  effected,  which 
may  be  hastened,  if  desired,  by  the  application  of  gentle  heat. 
Sodium  hydroxide  of  less  than  full  strength  may  be  used  provided 
its  actual  strength  be  taken  into  account. 
