AmDe°cU,r'i8P77rrm'}  Gleanings  from  the  Foreign  Journals.  597 
79*53  Per  cent«  tin.  The  formula  SnP  requires  78*89  per  cent. — Ber. 
deutsch.  chem.  Ges.,  1877,  p.  1459 — 1461. 
Compound  of  Thymol  and  Quinia.  By  C.  Pavesi. —  The 
author  reports  that  he  has  obtained  a  crystalline  compound  which  he 
calls  citro-thymolate  of  quinia,  by  treating  quinia  with  thymol  and  a 
small  quantity  of  citric  acid.  Four  parts  of  quinia  are  placed  in  a 
matrass  or  flask  with  6  parts  of  oil  of  thyme  and  a  sufficient  quantity 
of  alcohol  to  effect  complete  solution.  The  mixture  is  heated  in  a 
water-bath  for  a  few  minutes,  afterwards  allowed  to  stand  during  twelve 
hours,  and  then  2  parts  of  citric  acid  in  powder  added.  The  whole  is 
.again  heated,  filtered,  and  the  liquid  evaporated  to  a  syrupy  consistence. 
Upon  cooling,  a  yellow  matter  is  deposited  in  confused  crystals.  This 
substance  is  treated  with  boiling  water  and  animal  charcoal,  filtered 
and  evaporated  at  a  low  temperature  ;  after  twenty-four  hours  the  salt 
as  obtained  well  crystallized. 
This  crystalline  compound  of  quinia,  thymol  and  citric  acid,  is  very 
white,  moderately  soluble  in  cold  water,  more  soluble  in  boiling  water, 
and  very  soluble  in  alcohol.  It  has  a  very  bitter  taste  recalling  that  of 
oil  of  thyme.  The  presence  of  the  three  constituents  in  the  crystals 
•can  be  demonstrated  by  the  use  of  suitable  reagents  ;  but  the  exact 
composition  has  not  been  determined  by  the  author. — Phar.  Jour,  and 
Trans.,  Sept.  22. 
Hypophosphoric  Acid. — When  phosphorus  is  left  in  contact  with 
air  in  a  moist  atmosphere,  it  yields  an  acid  liquid  containing  phospho- 
rous (H3PO3)  and  phosphoric  (H3P04)  acids.  Th.  Salzer  has  recently 
found  in  it  a  new  acid,  which  he  calls  hypophosphoric  acid.  It  is 
bibasic  and  has  the  formula  H2POa.  Its  aqueous  solution  is  colorless, 
inodorous  and  not  altered  by  boiling  unless  evaporated  to  a  syrupy  con- 
sistence when  it  is  decomposed  by  heat  into  phosphoric  and  phosphor- 
ous acids.  Nitric  acid  does  not  affect  it,  until  by  concentration  in  the 
heat  the  decomposition  just  mentioned  has  taken  place,  when  the 
whole  is  oxydized  to  phosphoric  acid.  Most  of  the  other  oxydizing 
agents  have  a  similar  behavior,  except  potassium  permanganate,  which 
oxydizes  it  slowly  in  the  cold,  but  rapidly  on  boiling.  The  ordinary 
deoxidizing  agents  have  no  effect.  It  yields  a  crystalline  precipitate  of 
acid  sodium  hypophosphate  in  a  concentrated  solution  of  sodium  ace- 
tate, and  white  precipitates  with  lime  and  baryta  water,  ferric  chloride, 
