398 
Preliminary  Note  on  Ozone. 
f  Am.  Jour.  Pharm. 
\    Sept.  1, 1872. 
The  chloride  of  aluminium  present  corresponds  to  a  mixture  of  21 
per  cent,  chloride  of  sodium  with  17 J  per  cent,  anhydrous  sulphate 
of  alumina,  or  40  per  cent,  crystallized  sulphate  of  alumina,  or  57 
per  cent,  potassa  alum. 
II.  Chloralum  Powder. — White,  pulverulent,  resembling  chlori- 
nated lime,  but  inodorous. 
20-9  per  cent,  water. 
40*7       "       matter  soluble  in  water,  viz. : 
13-  4  per  cent,  chloride  of  aluminium. 
4-1      "       sulphate  of  alumina. 
9*1      "       sulphate  of  lime. 
14-  1      "       sulphate  of  soda. 
15*5       "       alumina  soluble  in  muriatic  acid. 
22*9       "       insoluble  in  muriatic  acid,  viz.  : 
13*5  per  cent,  kaoline,  anhydrous. 
9*4      "  '     silicic  acid. 
100-0 
Fluorine  and  phosphoric  acid  were  not  found. 
The  author  regards  these  articles  as  by-products  of  the  soda  facto- 
ries, to  utilize  the  muriatic  acid.  Crude  muriatic  acid,  containing 
but  little  iron,  is  allowed  to  act  upon  slightly  roasted  porcelain  clay, 
yielding  the  liquid  preparation  chloralum.  The  sediment,  dried  at  a 
moderate  heat,  with  the  addition  of  some  chloride  of  sodium  and  sul- 
phuric acid,  or  of  the  residue  from  rectifying  crude  muriatic  acid, 
constitutes  chloralum  powder. 
PRELIMINARY  NOTE  ON  OZONE. 
By  Charles  Thomas  Kingzett. 
Houzeau  found  that  the  oxygen  evolved  by  treating  baric  peroxide 
with  hydric  sulphate  contained  an  agent  possessing  the  properties  of 
ozone — that  is  to  say,  it  liberated  iodine  from  potassic  iodide,  and  was 
capable  of  oxidizing  ammonia.  I  am  not  aware  of  any  experiments 
in  the  same  direction  upon  oxygen  derived  from  other  sources. 
Whilst  experimenting  upon  ozone,  I  was  desirous  of  ascertaining 
if  oxygen  from  all  sources  possessed  the  properties  ascribed  to  that 
obtained  from  baric  peroxide  and  hydric  sulphate ;  therefore  I  made 
the  subject  a  matter  of  experiment,  and  obtained  amongst  my  results 
the  following : — 
