382 
Gleanings  from  Foreign  Jou7mals. 
(  Am.  Jour.  Pharm. 
t      Aug.,  1885. 
GLEANINGS  FROM  FOREIGN  JOURN^ALS. 
By  J.  Egbert  Moechel. 
Casein  Cement. — Mr.  Kayser  (Mitth.  d.  Bayer.  Gewerb.)  recom- 
mends this  cement  as  cheap  and  excellent  as  to  its  adhesiveness,  espe- 
cially in  cases  where  gum  arable  cannot  be  replaced  by  dextrin.  Heat 
milk,  precipitate  with  tartaric  acid,  collect  the  precipitate  and  dissolve 
while  moist  in  a  watery  solution  of  6  per  cent,  borax. — Rundschau, 
Leitm. 
Cement  for  China. — Dissolve  three  parts  of  freshly  precipitated 
casein  in  one  part  of  silicate  of  sodium. 
Excellent  Mucilage. — To  250  Gm.  of  a  concentrated  solution  of 
acacia  (2  p.  in  5  p.  water)  add  a  solution  of  2  Gm.  of  crystallized  sul- 
phate of  aluminium  in  20  Gm.  of  water.  Alum  in  place  of  the  salt 
mentioned  may  be  used,  but  gives  less  satisfaction.  For  decolorizing 
mucilage,  freshly  precipitated  iiydrate  of  aluminium  is  recommended. 
The  ordinary  mucilages,  particularly  if  very  concentrated,  often  fail  in 
their  object  by  merely  wetting  without  causing  to  adhere,  pasteboard  to 
pasteboard,  wood  to  wood,  or  a  metal  surface,  and  without  cementicg 
glass,  china,  pottery,  etc.  The  addition  of  aluminium  sulphate  is 
recommended  as  sufficient  to  impart  to  a  concentrated  mucilage  the 
desirable  adhesiveness.  Mucilage  intended  for  pharmaceutical  purposes 
should  not  be  clarified  as  stated  above,  since  in  mixtures  a  reaction 
with  aluminium  may  take  place. 
Pilules  Dehaut. — The  composition  of  these  pills  is  said  to  be  equal 
parts  of  aloes,  scammonium  and  colocynth.  Dorvault  gives  their 
composition  thus:  Aloes,  gamboge  and  extract  of  dandelion. 
Alimentary  Solution  for  Plants. — Potassium  nitrate  10  Gm.,  calcium 
carbonate  5  Gm.,  sodium  chlorate  5  Gm.,  calcium  phosphate  5  Gm., 
sodium  silicate  5  Gm.,  ferrous  sulphate  15  Gm.,  to  100  liters  of  water.. 
Stain  for  Ivory. — To  impart  a  brownish  tint  to  ivory,  place  it  in  a 
very  dilute  solution  of  nitrate  of  silver,  dry  and  expose  it  to  the  sun ; 
if  desired  to  impart  a  reddish  tint  treat  a  second  time  with  a  very 
dilute  solution  of  auric  chloride.  Pyrogallic  acid  is  also  adapted  for 
the  purpose. — Ph.  Ztg. 
Separation  of  Copper  and  Cadmium. — M.  A.  Behal  states  that  the 
following  easy  method  may  be  used  for  quantitative  analysis  :  If  to  a 
solution  of  a  copper  and  a  cadmium  salt  a  strong  alkaline  solution  of 
sodium  tartrate  is  added  no  precipitate  is  formed  except  a  faint  tur- 
