358 
Medicinal  Gelatins. 
f  Am.  Jour.  Phaim. 
t       July,  1S90. 
(3)  Fats,  balsams,  tars  and  ichthyol  all  make  the  basis  softer. 
The  proportion  added  is  usually  from  ten  to  twenty  per  cent. 
(4)  If  we  wish  to  combine  drugs  in  rules  2  and  3,  then  the  sum 
of  the  proportions  must  be  attended  to.  For  example,  if  resorcin 
and  salicylic  acid  were  both  ordered,  we  should  not  prescribe  more 
than  five  per  cent,  of  each  if  we  wish  the  gelatin  to  form  a  good 
covering. 
(5)  Powders  may  be  combined  in  any  proportions. 
(6)  Tannin,  pyrogallol  and  oxide  of  mercury  cannot  be  added  to 
the  basis. 
(7)  Corrosive  sublimate  up  to  three  per  cent  ,  camphor,  chloral, 
and  camphor  chloral  all  to  two  per  cent.,  ext.  cannab.  indie,  from 
two  to  five  per  cent.,  may  be  used  with  soft  zinc  gelatin. 
The  chemist  is  to  dispense  the  different  glues  in  pots,  which  are 
to  be  put  in  boiling  water  when  the  preparation  is  to  be  used.  It 
is  to  be  painted  on  the  skin  with  a  long-haired  brush. 
The  diseases  of  the  skin  for  which  Unna's  glues  are  recom- 
mended are  : 
Pruritus. — Zinc  glue  with  ext.  cannab.  indie,  chloral  hydr.,  car- 
bolic acid,  creasote,  salicylic  acid,  camphor,  camphor  chloral,  etc. 
Artificial  Erythema  a?id  Eczema  — Two  per  cent,  ichthyol  or  five 
per  cent,  sulphur  instead  of  ordinary  dusting  powders. 
Eczema  Intertrigo. — Hard  zinc  glue  with  ten  per  cent,  ichthyol 
or  five  per  cent,  resorcin. 
Eczema,  with  Great  Itching: — Two  per  cent,  ichthyol  or  five  per 
cent.  ext.  cannab.  indie. 
Peeling  after  Acute  Eczema. — Two  per  cent,  ichthyol  or  resorcin, 
five  per  cent,  sulphilr,  or  one  per  cent,  salicylic  acid. 
Ichthyosis. — Two  per  cent,  resorcin  or  five  per  cent,  sulphur  and 
ten  per  cent.  fat. 
Wounds  and  Ulcers. — Iodoform  zinc  glue.  , 
Acne  Pustulosa. — After  opening  the  pustules  paint  with  twenty 
per  cent,  sulphur  or  five  to  ten  per  cent,  resorcin,  one  per  cent,  per- 
chloride  of  mercury  with  or  without  two  per  cent,  salicylic  acid 
added  to  the  zinc  glue. 
The  soft  zinc  glue  will  form  a  useful  protection  to  the  sound  skin 
near  diseased  areas,  to  which  strongly  irritating  applications  have 
to  be  made. 
