"A  sept!7? ;  JsTOf" }     Gleanings  from  European  Journals.  393 
cover  the  isinglass,  which  is  dissolved  with  the  aid  of  heat.  To  this 
a  solution  of  \  oz.  of  mastic  in  f  oz.  alcohol  is  added,  and  then  \  oz. 
of  bruised  ammoniac,  the  whole  is  well  agitated  and  evaporated  in  a 
water-bath  until  it  has  the  consistence  of  thick  glue,  when  it  is  poured 
into  a  glass,  in  which  it  solidifies  like  jelly.  When  used,  the  cement 
is  liquefied  by  immersing  the  bottle  in  warm  water,  the  cement  is 
spread  with  a  pencil  upon  the  clean  edges  of  the  broken  pieces,  these 
are  pressed  together  and  set  aside  in  a  warm  place.  If  the  heat  was 
sufficient,  the  vessel  may  be  used  after  24  hours.  The  cement  be- 
comes very  hard.  Ammoniac  in  grains  is  the  best  for  this  purpose ; 
the  brown-yellow  cake  ammoniac  may  be  employed,  but  the  dark 
brown  sticky  varieties  are  useless. — Chem.  Centralbl.,  1872,  No.  25. 
Phot.  Arch.,  1872,  80. 
An  Improved  Gas  Burner  has  been  constructed  by  J.  W.  Cremin. 
The  gas  circulates  in  a  hot  metallic  vessel  under  the  burner,  and  is 
there  heated,  whereby  its  illuminating  power  may  be  increased  about 
60  per  cent. — Ibid.,  No.  26.    Polyt.  Journ.,  cciv,  187. 
Tooth  Powder. — Enderlein  prepares  a  tooth  powder,  of  a  beautiful 
red  color,  as  follows :  40  p.  cochineal,  30  p.  alum,  and  320  p.  cream 
of  tartar  are  mixed  with  sufficient  water,  and  the  mixture  heated  for 
several  hours  in  the  steam-bath.  250  p.  cuttlefish  bone  are  then 
added,  the  mixture  is  exsiccated  and  powdered,  and  the  powder  levi- 
gated with  sufficient  oil  of  almonds  until  it  acquires  a  velvety  appear- 
ance. A  suitable  perfume  is  attar  of  rose,  or  a  mixture  of  one  part 
of  attar  of  rose  and  2  p.  oil  of  peppermint. — Pharmac.  Zeitung, 
1872,  No.  53. 
Mercurial  Ointment. — For  extinguishing  the  mercury  rapidly  it 
has  been  recommended  to  triturate  it  with  thick  plasma  (starch  and 
glycerin). — Ibid.,  No.  54. 
Syrup  of  Eucalyptus. — 100  grm.  of  the  cut  leaves  are  macerated 
in  1  litre  of  boiling  water,  in  a  covered  vessel,  for  six  hours,  and  ex- 
pressed. The  infusion  is  decanted  from  the  sediment,  and  in  every 
100  grm.  of  the  liquid  190  grm.  of  sugar  are  dissolved,  in  a  covered 
vessel  placed  in  the  water-bath. — IS  Union  Pharmaceutique,  1872, 
June,  164. 
