218 
GLEANINGS  FROM  GERMAN  JOURNALS. 
oxygen  being  given  off. — Ihid.y  July  28,  from  PolytecJin, 
Notizhl.  1869,  252. 
An  improved  apparatus  for  Chlorine  Water  is  recommended 
by  Rieckher.  For  the  absorbing  vessel  he  uses  two  Woulfe's 
bottles  of  equal  capacity,  which  communicate  with  each  other  by 
a  glass  tube  reaching  from  near  the  bottom  of  one  to  the  same 
depth  in  the  other ;  the  last  one  from  underneath  the  stopper 
communicates  by  means  of  another  glass  tube  with  a  solution  of 
soda.  The  first  bottle  is  nearly  filled  with  water,  and  the 
generated  chlorine  is  conducted  into  it  beneath  the  stopper ;  the 
pressure  of  the  gas  gradually  displaces  the  water  from  the  first 
into  the  second  bottle,  wherein  the  water  is  saturated.  When 
the  evolution  of  gas  ceases,  the  rubber  connection  between  the 
generator  and  first  bottle  is  closed  tightly,  the  generator  and  the 
soda  solution  are  then  removed,  and  the  chlorine  water  slowly 
syphons  back  from  the  second  into  the  first  bottle.  R.  uses  for 
8  lbs.  water  2  oz.  bichromate  of  potassa,  and  11  oz.  crude  muri- 
atic acid.  If  towards  the  close  of  the  process  the  first  bottle  is 
set  into  a  refrigerating  mixture  of  Glauber's  salt  and  muriatic 
acid,  crystals  of  hydrated  chlorine  are  copiously  obtained.  The 
chlorine  water  with  the  suspended  crystals  is  then  filled  into 
small  bottles,  the  glass  stopper  is  tied  over  with  paraffin  paper, 
and  the  bottles  placed  upside  down  in  a  vessel  containing  water, 
so  that  it  reaches  above  the  mouth  of  the  bottle.  Thus  prepared 
and  preserved,  chlorine  water  will  keep  indefinitely. — Ibid.,  22 
—24. 
Adulterated  Saffron. — Saffron,  containing  some  yellow  fila- 
ments, was  observed  to  be  very  full  and  plump,  particularly  the 
latter  ;  it  was  found  to  have  been  treated  with  glucose  to  increase 
its  weight.  In  another  lot  the  pollen,  always  present  to  some 
extent,  was  found  to  have  been  imitated  by  the  addition  of  12 
per  cent,  gypsum. — Ibid.  38,  from  Deutsche  G-ewerbezeitung, 
1869,  No.  22. 
To  prevent  concussions  in  boiling  liquids. — E.  Winkelhofer 
generates  in  these  liquids  a  gas  by  means  of  electricity. — Zeitsch. 
f.  Qhemie,  1869,  430,  from  Ber.  d,  Ghem.  (jfesellsch,,  Berlin, 
1869,  191. 
