582  Solution  of  Hydrogen  Peroxide. 
organic  preparations  of  silver.  {Chemist  and  Druggist,  Sept.,  1906, 
page  462.) 
The  Formation  of  Cocaine  in  Coca  Leaves,  according  to  the  investi- 
gation of  K.  de  Tong,  occurs  mainly  in  young  leaves.  With  the 
increase  in  the  size  and  age  of  the  leaf  the  alkaloid  content  decreases 
but  is  not  totally  absent  even  in  dead  leaves.  (Phar.  Zeit.,  Sept., 
1906,  page  795.) 
To  Purify  Drinking  Water. — M.  Lambert  proposes  to  add  0.06 
grammes  of  potassium  permanganate  to  each  liter  of  water.  This 
should  be  left  standing  for  ten  minutes  and  then  O.IO  of  manganous 
sulphate  added.  The  resulting  mixture  is  then  allowed  to  precipi- 
tate and  the  supernatant  clear  liquid  decanted  off.  {Chemist  and 
Dtuggist,  Sept.,  page  389.) 
Tulase. — This  is  the  name  that  has  been  given  by  Professor  Behr- 
ing  to  his  immunizing  and  curative  serum  for  tuberculosis.  This 
serum  is  now  being  furnished  in  an  experimental  way,  for  practical 
trial.    (Chemist  and  Druggist,  Sept.,  1906,  page  422.) 
Tyree's  Antiseptic  Powder. — The  report  of  a  sub-committee  of  the 
Council  on  Pharmacy  and  Chemistry  of  the  American  Medical 
Association  (Jour.  A.M. A.,  Oct.  20,  1906,  page  13 16)  calls  attention 
to  the  fact  that  while  this  preparation  is  advertised  as  being  a  mix- 
ture of  sodium  borate,  and  alum  with  phenol,  thymol,  glycerin, 
menthol,  oil  of  eucalyptus  and  oil  of  gauitheria,  it  is,  in  reality, 
composed  of  approximately  15.5  per  cent,  of  anhydrous  zinc  sulfate, 
81.2  per  cent,  of  boric  acid  and  0.5  per  cent,  of  volatile  matter  con- 
sisting of  a  mixture  of  odorous  materials  sufficient  to  give  the 
mixture  its  distinctive,  characteristic  odor. 
SOLUTION  OF  HYDROGEN  PEROXIDE  CONTAINING 
ACETANILIDE. 
By  Charxes  H.  IvaWaij,. 
The  writer  was  recently  very  much  surprised  by  having  his  atten- 
tion called  to  several  samples  of  hydrogen  peroxide  solution  from 
different  sources,  all  of  which  had  a  strong  odor  resembling  nitro- 
benzol.  Upon  obtaining  a  sufficient  quantity  and  shaking  it  out 
with  ether,  evaporating  the  solvent  carefully  and  testing  the  residue 
