300 
Topical  Applications. 
Am.  Jour.  Pharm. 
July,  1917. 
This  ointment  is  a  good  base  for  other  remedies,  providing  they 
contain  no  incompatible  substance. 
Ointment  of  Yellow  Mercuric  Oxide. 
Gm. 
Yellow  mercuric  oxide   1 
White  petrolatum    99 
In  a  white  porcelain  mortar  which  has  been  heated  to  6o°  C. 
place  the  yellow  mercuric  oxide  and  triturate  with  the  white  petro- 
latum, the  latter  a  little  at  a  time  until  the  oxide  is  completely  in- 
corporated. 
The  yellow  mercuric  oxide  should  be  made  by  the  wet  process 
for  this  ointment. 
The  finished  product  must  be  absolutely  free  from  any  visible 
particles  of  the  oxide  even  when  a  thin  film  is  spread  upon  clear 
glass. 
This  ointment  is  probably  more  frequently  used  in  ophthalmic 
practice  than  any  other. 
Alkaline  Antiseptic  Solution. 
Gm. 
5:  Camphor 
Thymol,  aa    0.54 
Sodium  chloride 
Sodium  benzoate,  aa    5.40 
Sodium  bicarbonate   11.00 
Oil  of  spearmint   .60 
Oil  of  eucalyptus 
Oil  of  pine  needles,  aa   .90 
Alcohol   10.00 
Glycerin    27.00 
Water,  q.s   1,000.00 
It  is  the  purpose  of  the  above  solution  to  act  as  an  alkaline 
cleanser  and  render  the  parts  aseptic  and  produce  exosmosis. 
In  order  to  have  this  exosmotic  effect  it  will  have  to  be  of  a 
specific  gravity  lower  than  1.020.  This  solution  when  made  accord- 
ing to  the  above  formula  at  a  temperature  of  700  F.  will  have  a 
specific  gravity  of  from  1.0185  to  1.0190.  The  alcoholic  strength  is 
reduced  to  a  minimum  so  as  to  lessen  the  irritating  effects. 
This  preparation  is  used  as  an  eye  lotion  because  of  its  thorough 
cleansing,  antiseptic  properties. 
