582  Gleanings  from  the  German  Journals.  {Am'Novy,'i8<»arm' 
Unguentum  Aluminii  acetici. — Liquoris  Aluminii  acetici,  40-0; 
Unguenti  simplicis,  20  0;  Lanolini,  io-O. 
Unguentum  Calcii  bisulfurosi. — Solutionis  Calcii  bisulfurosi,  40-0; 
Unguentum  simplicis,  20  0;  Lanolini,  io-o.  The  commercial  solutions 
of  bisulphite  of  calcium  range  in  specific  gravity  from  ro6  to  I- 10 
at  150  C. ;  an  average  solution  sp.  gr.  1-08,  contains  5-61  per  cent. 
CaSOs  and  4-88  per  cent,  free  S02.  If  the  calcium  bisulphite  solu- 
tion be  mixed  with  anhydrous  lanolin,  an  ointment  is  obtained 
which  does  not  evolve  S02;  by  mixing  this  ointment  with  water 
S02  is  liberated.  If,  however,  the  lanolin  be  mixed  with  a  glycerin- 
fat,  as  in  the  above  formula,  the  mixture  acts  as  a  rich  reservoir  of 
S02.  Calcium  bisulphite  solution  is  used  instead  of  aqueous  sul- 
phurous acid,  because  the  sulphuric  acid  formed  by  oxidation  of  the 
sulphurous  acid  will  unite  with  the  calcium,  and  only  the  action  of 
S02  is  obtained. 
Unguentum  Hydrogenii  peroxydati. — Solutionis  Hydrogenii  per- 
oxydati,  20-0-40-0;  Vaselini,  20  0;  Lanolini,  100.  To  retard  the 
action  of  the  H202  an  addition  of  vinegar  may  be  made.  This 
ointment  is  an  excellent  article  to  remove  comedones. 
Unguentum  Calcii  chlorati. — Solutionis  Calcii  chlorati  (33-3  per 
cent.),  40;  Unguenti  simplicis,  20-0;  Lanolini,  100.  This  neutral 
calcium  chloride  ointment  is  useful  as  a  base  in  the  treatment  of  Acne 
Ichthyosis,  etc  ;  additions  of  zinc  ointment,  precipitated  sulphur, 
hydrogen  peroxide,  resorcin,  etc.,  may  be  made  in  such  treatment. — 
{Therapeut.  Monatshefie)  Pharm.  Centralhalle,  1890,  549. 
Rancidity  of  fats  has  been  very  carefully  investigated  by  D.  E. 
Ritsert,  with  the  following  results:  Rancidity  is  not  due  to  the 
presence  of  bacteria,  as  sterilized  fats  will  become  rancid  ;  it  is  due 
to  a  direct  oxidation  of  the  fat  by  the  oxygen  of  the  air,  and  is 
intensified  by  exposure  to  light.  Fats  carefully  protected  from  the 
atmospheric  oxygen  if  exposed  to  direct  sunlight  will  not  become 
rancid.  The  presence  of  moisture  is  not  regarded  as  essential  to 
the  change.  To  preserve  fats,  the  first  condition  to  be  complied 
with  is  to  absolutely  prevent  access  of  air;  this  attained,  it  is  imma- 
terial if  the  fat  be  exposed  to  light  or  not. — Pharm.  Ztg.,  1890, 
579,  586  and  602. 
The  red  color  of  sidphuric  acid,  noticeable  quite  frequently  in  the 
commercial  acid,  is  due  to  the  presence  of  small  quantities  of  ferrous 
iron,  and  at  the  same  time  of  some  of  the  oxides  of.  nitrogen.  The 
