GLEANINGS  FROM  THE  GERMAN  JOURNALS. 
315 
measures  1000  c.  c.  m.  less  the  bulk  of  the  insoluble  clay  and 
carbonate  of  lime  (Arch.  d.  Ph.  ciii.  270-272.) 
Titration  of  Lye  for  Carbonic  Acid. — Dr.  Grager  takes  10 
c.  c.  m.  of  Ije  of  known  amount  of  alkali,  adds  an  equivalent 
amount  of  chloride  of  ammonium,  then  an  equivalent  of  chloride 
of  calcium ;  after  settling,  a  portion  of  the  clear  liquid  is 
measured  with  oxalic  acid.  Less  alkali  will  now  be  found  if 
carbonic  acid  was  present  ;  the  difference  is  carbonate. — (Arch. 
d.  Ph.  civ.  18,  19.) 
Adhesive  Plaster  is  occasionally  obtained  very  soft,  which 
Feldhaus  thinks  is  due  to  the  formation  of  acid  oleates,  &c.  which 
do  not  decompose  the  carbonate  of  lead,  present  in  litharge. 
Such  a  plaster  can  be  made  use  of  by  the  addition  of  a  little  plas- 
ter prepared  from  lard.  If  the  oil  should  contain  too  little 
stearine  and  palmitine,  an  addition  of  lard,  in  no  case  exceeding 
10  per  cent.,  will  yield  a  plaster  of  proper  consistence. —  (Arch, 
d.  Ph.  civ.  29-33.) 
Adulteratio7i  of  Liquorice. — H.  J.  Versmann  met  with  a  Sicily 
liquorice,  adulterated  with  the  extract  of  the  root  of  Triticum 
repens,Linn.,Extractum  graminis  of  the  German  Pharmacopoeias. 
—  (Arch.  d.  Ph.  civ.  84.) 
No  Iodine  in  Sarsaparilla  Root. — The  same  author  examined 
Honduras  Sarsaparilla  for  Iodine  without  finding  a  trace  ;  still 
he  thinks  it  possible  that  under  peculiar  circumstances  the  root 
may  contain  it,  as  has  been  asserted  by  Guilliermond. — (Arch, 
d.  Ph.  civ.  35.) 
Permanganic  Acid. — Hermann  Asclioff  has  made  a  number 
of  analyses  in  Prof.  Mitscherlich's  laboratory,  and  disproves  the 
assertion  of  T.  L.  Phipson,  that  permanganate  of  potassa  was 
KO,  2Mn03.  He  found  Mn49.7r),  0  50.39  ;  the  formula  Mn^O^ 
requires  49.61  and  50.39  respectively.  On  condensing  the 
greenish  brown  gas,  resulting  from  the  reaction  of  SO3,  NaCl 
and  KO,  MnO^,  some  oily  drops  were  obtained,  which  agreed 
in  composition  with  the  formula  Mn^ClOg,  but  the  author  is  in- 
clined to  regard  it  rather  as  a  solution  of  MnCl^  in  MnO^. — 
(Arch.  d.  Ph.  civ,  141-157.) 
