418 
GLEANINGS  FROM  GERMAN  JOURNALS. 
ing  is  continued  for  a  few  minutes,  the  mass  diluted  -witli  four 
parts  water,  and  filtered  ;  the  filtrate  is  used  for  saturating 
printing  paper.  This  is  dried  and  preserved  as  before,  and 
marked  B,  myronic  acid. 
To  prepare  a  sinapism,  eqwal-sized  pieces  are  cut  from  A  and 
B,  one  laid  upon  the  other,  moistened  with  water,  and  fastened' 
upon  the  skin  with  a  bandage. — Ibid.^  238 — 241. 
Pyrolusite  as  a  test  for  the  color  of  Claret. — A.  Facen  [Journ. 
deMed,  deBrux.  1868,  Aout)  states  that  black  oxide  of  manganese 
removes  from  claret  the  natural  red  color,  and  this  test  has  been 
recommended  as  reliable  by  a  commission  of  experts.  Wittstein 
corroborates  the  fact  that  the  natural  color  of  red  wine  is  removed 
thereby,  but  found  that  the  color  imparted  to  wine  by  hollyhock 
is  affected  in  precisely  the  same  way,  and  since  these  flowers  are 
largely  used  in  the  manufacture  of  claret,  the  test  is  unreliable. 
—Ihid.,  241,  242. 
G-lycerin  as  an  application  to  hums  is  recommended  by  J. 
Fuchs.  Through  the  explosion  of  a  spirit  lamp  the  greater  por- 
tion of  his  face  had  been  covered  with  rather  deep  burns,  which 
healed  in  a  week  by  the  immediate  and  oft-repeated  application 
of  glycerin,  without  producing  blisters  or  festering,  or  leaving 
any  scar. — Schiveiz.  Woehenschr.  1869,  No.  6,  from  Bresl. 
Gewerhehl. 
Paraffin  in  Wax, — Hager  has  met  with  a  wax  adulterated  with 
its  own  weight  of  paraffin.  To  estimate  its  quantity,  two  grammes 
of  the  suspected  wax  are  fused,  then  boiled  for  a  few  minutes  with 
a  solution  of  1*5  potassa  in  4  or  5  w^ater,  and  agitated  until 
homogeneous  and  almost  congealed.  Six  to  eight  grammes  petro- 
leum ether  (so-called  benzine)  are  carefully  added,  the  whole 
well  shaken,  an  excess  of  aqueous  solution  of  sugar  of  lead  is 
added  "with  constant  agitation,  when  the  mixture  is  set  aside. 
The  petroleum  solution  is  separated,  the  residue  repeatedly 
washed  with  the  same  liquid,  and  the  decanted  liquid  evaporated. 
Fure  yellow  wax  leaves  a  residue  of  15  per  cent. ;  any  excess  is 
due  to  paraffin. — Ibid.,  No.  15,  from  Pharm,  Cent.  Halle. 
Podopliyllin,  according  to  some  French  journals,  is  prepared 
by  boiling  the  rhizome  with  milk  of  lime,  adding  to  the  filtrate  a 
