466 
ON  SPIRITUS  AMMONL33  AROMATICUS. 
silent  discharge;  but  with  the  spark  a  very  slight  alteration  of 
volume  appeared  to  occur,  the  cause  of  which  is  still  under  in- 
vestigation. 
In  the  experiments  now  described,  the  electrical  sparks  and 
discharge  were  always  obtained  from  the  common  friction-ma- 
chine. The  discharge  from  the  induction  coil,  even  when  passed 
through  two  Leyden  jars,  produces  very  insignificant  ozone 
effects.  The  heat  which  always  accompanies  this  discharge,  and 
its  comparatively  feeble  tension,  sufficiently  explain  its  want  of 
energy. 
All  the  results  recently  obtained  by  the  authors  fully  confirm 
the  former  experiments  of  one  of  them*,  that  in  no  case  is  water 
produced  by  the  destruction  of  ozone,  whether  prepared  by  elec- 
trolysis or  by  the  electrical  discharge.  They  reserve  any  fur- 
ther expression  of  their  views  as  to  the  true  relations  which 
exist  between  ozone  and  oxygen,  till  they  shall  have  an  oppor- 
tunity of  laying  the  results  of  this  inquiry  in  a  more  complete 
form  before  the  Society. — London  Chem.  Gfaz.  June  1,  1859. 
REMARKS  ON  SPIRITUS  AMMONIiE  AROMATICUS. 
By  Mr.  C.  R.  Tichborne. 
The  disparity  in  composition  which  the  three  Pharmacopoeias 
exhibit  in  this  article  is  greater  than  at  first  sight  strikes  the 
eye.  It  is  but  one  of  the  many  cases  of  dissimilarity  presented 
by  these  works,  which  in  some  of  the  other  preparations  must 
have  produced  serious  results ;  but  tempora  mutantur.  If  we 
compare  the  methods  directed  to  be  followed  by  the  three  col- 
leges, we  shall  find  little  analogy,  Thus,  placing  them  in  juxta- 
position, we  shall  find  that  in  about  three  pints,  the  formulae 
contain  respectively — 
Rectified  Bpi- 1  L 
/v-      K    { specific 
rit  On.  water  >  1 
Q       J  f  gravity 
■J*  J  about  .900 
Chloride  of  ammonium 
Carbonate  of  potash,  ^v, 
Aromatics  in  their  primi- 
tive form,  ^xxss. 
Specific  gravity.  -918. 
Rectified  spirits,  Oij.^xiv, 
Solution  of  ammonia 
specific  gravity  -900 
Aromatics  in  the  form  of 
volatile  oils,  ^v.  TT|Jj 
Specific  gravity  -852. 
E.  PH. 
Spirits  of  ammonia,  Oij. 
^xvij.  3v.  tr[hnj. 
Aromatics  in  the  form  of 
volatile  oils,  gxviij.  T^j* 
Specific  grav.  about  .846. 
*  Philosophical  Transactions  for  1856,  Part  I. 
