IOO 
Pilula  Ferri  Protochloridi. 
Am.  Jour.  Pharna. 
Feb.,  1891. 
of  vanilla  and  essence  of  wintergreen.  M.  Ferrand  remarked  that 
the  wintergreen  present  could  not  have  been  derived  from  gaultheria 
procumbens.    M.  Martindale  observed  that  it  was  extracted  from 
betula  lenta. 
V  Solubility  of  Beta-Naphthol  with  Boric  Acid.  —  At  the 
November  meeting  of  the  Paris  Society  of  Biology,  M.  Anotta 
reported  that  while  beta-naphthol  has  a  solubility  of  only  20  cgm. 
per  1,000  in  pure  water,  it  will  dissolve  in  the  proportion  of  70  to 
80  cgm.  per  1,000  in  water  saturated  with  boric  acid.  The  presence 
of  naphthol  in  a  boric  acid  solution  adds  sensibly  to  its  antiseptic 
power. — Repert.  de  Phar.,  Dec.  10,  1890. 
Examination  of  Sub-Nitrates  of  Bismuth. — M.  Schulze  found 
that  the  various  samples  examined,  contained  sub-carbonate,  sub- 
chloride  and  free  hydrate  of  bismuth,  and  free  water.  In  seven 
sealed  samples  from  as  many  manufacturers,  the  amount  of  water 
averaged  23  per  1,000;  the  amount  of  sub-carbonate  of  bismuth 
present  was  203  per  1,000.  In  five  samples,  the  average  amount 
of  sub-chloride  was  42  per  1,000.  The  amount  of  carbonic  acid 
present  was  ascertained  by  the  use  of  Yvon's  ureometer.  The 
chlorine  was  measured  by  Volhard's  method,  in  which  the  sub- 
nitrate  is  dissolved  in  a  nitric  acid  liquor,  leaving  the  chlorine.  To 
find  the  amount  of  nitric  acid  present,  the  author  used  Eder's  pro- 
cess, which  he  considers  the  best.  He  does  not  describe  it  except 
to  say  that  it  requires  the  use  of  Kipp's  carbonic  acid  apparatus. — 
Repert.  de  Phar.,  Dec,  1890. 
PILULA  FERRI  PROTOCHLORIDI.1 
By  James  B.  McLaren. 
Prescriptions  for  pills  of  protochloride  of  iron  have  been  pretty 
common  of  late.  Usually  the  excipient  is  left  to  the  discretion 
of  the  dispenser,  but  in  several  instances  recently  I  have  seen 
anhydrous  lanolin  prescribed  for  this  purpose. 
Probably  this  excipient  has  been  suggested  by  the  paper  read 
before  this  Association  by  Mr.  Millar,  in  which  he  recommended 
lanolin  as  an  excipient  for  potassium  permanganate  pills  and  other 
similar  substances. 
1  Read  before  the  Edinburgh  Chemists'  Assistants'  Association  ;  reprinted 
from  Phar.  Jour,  and  Trans. ,  Dec.  20,  1890,  p.  553. 
