400  Gleanings  from  the  Foreign  Journals.  { A%u°gU^8P77arm' 
The  precipitates  are  white  (with  piperina  yellow),  soluble  in  dilute 
muriatic  acid,  and  decomposed  by  water. 
3.  Solution  of  stannous  chloride,  with  solutions  acidulated  with 
muriatic  acid  : 
Precipitates  from  dilute  solutions  :  From  cone,  solutions:  No  precipitate s 
Aconitia,  atropia,  brucia,  quinia,  cin-  Nicotina.  Caffeina. 
chonia,  codeia,  conia,  morphia,  pi- 
perina, solania,  strychnia,  veratria. 
The  precipitates  are  white  and  crystalline,  slightly  soluble  in  water, 
less  in  acidulated  water  ;  the  solution  of  caffeina  with  stannous  chloride 
in  muriatic  acid  yields,  on  evaporation,  crystals  of  the  double  salt. — 
Archiv  d.  Phar. 
Hydriodate  and  Hydrobromate  of  Morphia. — The  former  salt, 
whether  prepared  by  dissolving  morphia  in  hydriodic  acid,  or  by  double 
decomposition  of  morphia  acetate  and  potassium  iodide,  according  to 
E.  Schmidt,  crystallizes  in  long  silky  needles  of  the  composition 
C17H19N03HI+2H20.  They  are  sparingly  soluble  in  cold,  more 
readily  in  hot  water,  lose  the  2rl20  when  exposed  to  ioo°  C,  and 
reabsorb  the  water  again  on  exposure  to  the  air. 
The  hydrobromate  resembles  the  former  salt  in  appearance,  behavior 
and  composition,  the  latter  being  C17H19N03HBr-j-2H20. — Ber.  d. 
deutsch.  Chem.  Ges.,  1877,  P-  I94* 
Citrate  of  Iron  and  Quinia. — Three  samples  manufactured  in 
England,  two  of  which  were  labeled  "  British  Pharmacopoeia,*'  were 
found  by  B.  H.  Paul  to  be  very  deficient  in  quinia.  The  Pharmaco- 
poeia requires  16  per  cent,  of  that  alkaloid,  but  the  yield  was 
Quinia,        ........    6-8o       7.08        1*69  per  cent. 
Other  alkaloids  (cinchonia,  cinchonidia,  etc.),  .  216  2-62  5-36  " 
Total,  .   8-96       9*70       6-96  " 
Professor  Attfield  corroborated  the  statement  that  an  unprincipled 
manufacturer  had  been  palming  off  the  preparation  as  being  of  official 
strength,  while  it  contained  only  about  one-half  the  amount  of  alkaloid. 
— Phar.  Jour,  and  Trans. ,  April  14  and  21. 
On  the  so-called  Citrate  and  Valerianate  of  Caffeina. — P.  J. 
Haaxman  repeats  the  statement  of  Hager  and  others  that  caffeina  does 
not  combine  with  citric  acid,  and  that  the  so-called  citrate  of  caffeina 
is  merely  the  alkaloid  with  a  little  free  acid  adhering  to  it.  From  his 
experiments  made  with  caffeina  and  valerianic  acid  he  arrives  at  the 
