228  Abstracts  from  the  French  Journals.  {Am-£^i8p9|arm- 
of  the  air-dry  leaves  of  P.  alba  3  grains  of  pure  populin  and  12 
grains  of  pure  salicin  ;  but  the  autumnal  leaves  of  the  latter  tree 
were  not  bitter,  and  contained  no  salicin.  Incidentally  he  remarked 
that  the  preparation  of  salicin  was  much  more  easily  effected  from 
the  poplars  than  from  willow  bark. 
ABSTRACTS  FROM  THE  FRENCH  JOURNALS. 
Translated  for  The  American  Journal  of  Pharmacy. 
Diuretin  in  infantile  practice. — Dr.  R.  Demme  {Semaine  medicale, 
1892,  No.  10)  reports  that  doses  of  diuretin  ranging  from  0  50  to 
1-50  gm.  can  be  administered  to  children  of  two  to  five  years,  and 
1-50  gm.  to  3  00  gm.  to  those  of  six  to  ten.  For  children  under 
the  age  of  one  year  diuretin  is  contraindicated,  as  it  is  apt  to  produce 
gastro-intestinal  irritation.  A  good  way  of  exhibiting  diuretin  is : 
Diuretin,  I  50  gm.;  water  100  gm.,  cognac  10  drops,  sugar  2-50 
gm.,  to  be  given  in  tablespoonful  doses  in  twenty-four  hours. 
Diuretin  should  not  be  given  in  acid  mixture  or  with  anything 
which  like  the  acids  precipitate  the  theobromine  out  of  its  solutions. 
Solutions  of  camphor  for  hypodermic  injections. — A  solution  of 
camphor  possessing  good  keeping  qualities  and  producing  no  abscess 
from  the  punctures  is  the  following  :  Camphor  2-0,  liquid  paraffin 
8-o  gm.  The  camphor  is  dissolved  in  the  liquid  paraffin  by  heat- 
ing slightly. — {four,  de  Pharm.  d'Anvers,  1892,  p.  54,  from  Bull 
de  la  Soc.  med.  Gand.) 
Preparation  of  carvacrol. — A.  Reychler  reports  {Bull.  Soc.  Chimt 
[3]  vij.  31)  having  obtained  90  per  cent,  of  the  theoretical  quantity  of 
carvacrol  by  operating  as  follows :  Mix  carvol  chlorhydrate  with 
not  over  2  per  cent,  of  anhydrous  zinc  chloride,  and  for  the  purpose 
of  avoiding  too  energetic  action,  add  about  30  per  cent,  of  glacial 
acetic  acid ;  heat  the  mixture  in  a  flask  connected  with  a  reversed 
condenser.  At  95 0  C.  hydrogen  chloride  begins  to  be  evolved,  and 
it  ceases  near  1200.  Most  of  the  acetic  acid  may  be  recovered  by 
crystallization,  the  remainder  is  removed  with  water,  together  with 
the  zinc  chloride ;  the  carvacrol  is  separated  by  distillation. 
For  the  detection  of  oil  of  turpentine  in  volatile  oils. — L.  Crismer 
proposes  {Bull.  Soc.  Chim)  a  solution  of  potassium  acid  tartrate, 
20  gm.,  neutralized  with  manganous  carbonate  (about  6  gm.),  in  I 
