AMseJP°tDi;iP872rM  }  Commercial  Chloride  of  Aluminium.  397 
kept  for  some  time  in  an  open  cylinder,  carefully  protected  from  dust 
and  ammonia. 
The  absence  of  hydrogen  peroxide  was  established  by  the  follow- 
ing experiments :  Strong  ozone  water,  treated  with  '  ether  and  little 
bichromate  of  potassa,  did  not  impart  a  blue  color  to  the  ether ;  ozone 
water,  after  having  been  kept  in  a  beaker  glass  for  some  time  at  a 
temperature  of  30  to  40°  C,  did  not  oxidize  a  solution  of  ferrous 
sulphate. 
The  degree  of  solubility  of  ozone  in  water  cannot  be  established, 
because  it  cannot  be  obtained  in  a  pure  state,  but  is  always  mixed 
with  variable  and  large  proportions  of  oxygen.  In  two  experiments 
the  author  found  the  mixture  to  contain  ozone  equal  to  0*929  and 
1*211  per  ct.  by  volume.  1000  c.c.  of  the  aqueous  solution  of  ozone 
were  found  to  contain  0*0109,  0*0091  and  0*0083  grm.  of  ozone,  which 
figures  are  equal  at  0°  C.  and  0,m76,  to  511,  4*24  and  3*86  c.c. 
The  author  examined,  also,  the  ozonized  water*  as  prepared  by 
Krebs,  Kroll  &  Co.,  of  Berlin,  and  found  it  free  from  hydrogen  per- 
oxide, nitrous  and  nitric  acid.  1000  c.c.  contained  0*00955  and 
0*00871  grm.,  equal  to  4*45  and  4*06  c.c.  of  ozone. 
ON  THE  COMMERCIAL  CHLORIDE  OF  ALUMINIUM. 
By  Alexander  Mueller.! 
The  author  has  analyzed  samples  of  so-called  chloralum  and  chlo- 
ralum  powder,  of  English  manufacture,  with  the  following  results  :% 
I.  Chloralum. — A  thin  light  yellow  liquid,  with  a  faint  odor  remind- 
ing of  crude  muriatic  acid,  and  of  a  moderate 
acidity. 
16*1  per  cent,  chloride  of  aluminium. 
1*7      "       chloride  of  calcium  (containing  magnesium). 
0*1      u       sulphates  of  alkalies. 
1*2      "       muriatic  acid. 
19-1  "  soluble  constituents,  anhydrous. 
80*9      "  water. 
1000 
*  See,  also,  Amer.  Journal  of  Pharmacy.  1872,  March,  105. 
t  Abridged  from  Berichte  d.  d.  Chem.  Gesellsch.  zu  Berlin,  1872,  No.  11, 
p.  519. 
X  See,  also,  Prof.  Fleck's  analysis  in  Amer.  Journ.  of  Pharmacy,  1872,  June, 
page  268. 
