'^™jJnri883^™'}  Aromatic  Syrup  of  Liquorice.  305 
per  cent,  by  volume  of  ethyl  alcohol  and  6  per  cent,  by  volume  of 
water,  whereas  the  correct  composition  is  94  per  cent,  by  volume  of 
alcohol  and  7*29  per  cent,  of  water.  Also,  in  the  case  of  alcohol 
dilutum,  the  correct  proportions  are  53  per  cent,  by  volume  of  ethyl 
alcohol  and  50" 73  per  cent,  of  water,  in  place  of  53  per  cent,  of  alcohol 
and  47  per  cent,  of  water  as  is  there  given.  Tiie  rules  here  annexed 
will  be  found  of  great  service  in  making  alcoholic  mixtures  for  prepar- 
ing tinctures,  etc. 
1.  To  reduce  alcohol  to  any  required  strength.  To  as  many  parts 
of  the  given  alcohol  as  are  indicated  by  the  percentage  required,  add 
sufficient  water  to  make  the  number  of  parts  of  the  mixture  equal  to 
the  percentage  of  the  given  alcohol.  Example  :  It  is  desired  to  make 
an  alcohol  of  30  per  cent,  from  one  of  95  per  cent.  Take  30  fluid- 
ounces  of  the  alcohol  and  add  a  sufficient  amount  of  water  to  make  95 
fluidounces. 
2.  To  make  any  required  quantity  of  any  per  cent.  As  the  per- 
centage of  the  alcohol  given  is  to  that  of  the  alcohol  required,  so  is  the 
quantity  desired  to  the  quantity  of  the  alcohol  to  be  taken.  And  to 
this  quantity  of  alcohol  sufficient  water  must  be  added  to  make  up  the 
required  quantity.  Example  :  It  is  desired  to  make  80  fluidounces  of 
75  per  cent,  alcohol  from  that  of  95  per  cent.  As  95  :  75  :  :  80 :  QS^-^. 
This  represents  the  number  of  fluidounces  of  95  per  cent,  alcohol  that 
is  to  be  made  up  to  80  fluidounces  by  the  addition  of  water. 
By  these  rules  allowance  is  made  for  any  contraction  that  may  take 
place,  and  a  mixture  after  being  made  should  be  allowed  to  stand  for  a 
short  time  for  such  contraction  to  take  place,  when  a  final  amount  of 
water  is  to  be  added  to  make  up  the  full  measure. 
Aromatic  Syrup  of  Liquorice. — Having  frequent  demands  for 
syrupus  glycyrrliizse  aromaticus  in  combination  with  salts  of  quinine, 
I  have  adopted  the  following  formula,  by  which  a  preparation  is 
obtained  not  only  disguising  the  bitterness  of  the  alkaloid,  but  also 
imparting  a  delicate  aromatic  and  astringent  flavor. 
Take  of 
Extractiim  glycyrrhizse  fluid  urn  25  parts. 
Extractum  aromaticum  fluidum  10  " 
Mel  Rosfe  15 
Syrupus  50  " 
Mix  them. 
Philadelphia,  May  22,  1883.  AlLEN  ShyROCK. 
20 
