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GLEANINGS  FROM  THE  GERMAN  JOURNALS. 
green.  On  continuing  the  addition  of  tannin,  three  clear,  yel- 
low or  greenish  yellow  strata  are  obtained  ;  the  middle  one  is  a 
solution  of  tannin  in  aqueous  ether,  the  lowest  one  contained 
tannin,  water  and  ether  and  may  probably  be  a  compound  of 
tannin  and  ether. — (See  Parrish's  Pharmacy,  page  377.  Ann. 
d.  Ch.  u.  Ph.  xxxix.  63—67.) 
Crystallized  compounds  of  aluminium  with  metals,  were  ob- 
tained by  Michel,  on  fusing  tungstic  acid  or  perfluoride  of 
molybdenum  with  kryolite,  aluminium  and  flux,  and  by  fusing 
the  respective  chlorides  w^ith  alkaline  chlorides  and  aluminium. 
Most  compounds  are  insoluble  in  cold  diluted  acids,  all  lose  the 
aluminium  by  cold  or  hot  solution  of  caustic  soda.  Their  re- 
spective composition  was  found  :  AI3  Ti,  Al^  W,  Al^  Mo,  Mn  AI3, 
Fe  AU,  Ni  Al,.~(Ann.  d.  Ch.  u.  Ph.  xxxix.  102—105.) 
Acids  of  benzoin. — Kolbe  and  Lautemann  observed  that  dif- 
ferent acids  are  contained  in  various  kinds  of  benzoin.  Some 
ordinary  varieties  and  tears  of  unknown  origin  yielded  benzoic 
acid,  while  the  handsome  tears  from  Sumatra,  yielded  an  acid 
fusing  under  water  to  a  clear  colorless  liquid,  probably  Strecker's 
toluylic  acid  (Ann.  d.  Ch.  u.  Ph.  xxxix.  113.) 
Acetate  of  soda,  deprived  in  vacuo  of  its  6  equivs.  water  of 
crystallization,  absorbs  the  same  again  on  exposure  to  a  moist 
atmosphere  w^ithout  materially  altering  its  appearance.  But  if 
obtained  in  the  anhydrous  state  by  fusion  or  by  exposure  to  212^ 
F.  it  may  absorb  14  equiv.,  and  crystallization  will  not  take 
place,  unless  it  is  agitated  or  comes  in  contact  with  a  solid  body 
*  or  a  trace  of  the  other  dry  acetate.  The  author,  C.  S. 
Reischauer,  argues  that  the  so-called  supersaturated  solutions 
might  probably  be  viewed  as  solutions  of  the  anhydrous  salts. — 
(Ann.  d.  Chem.  u.  Pharm.  xxxix.  116 — 120.) 
Titration  of  iodine  and  bromine, — The  solution  of  the  mixed 
iodide  and  bromide  is  agitated  with  chloroform,  until  a  little^ 
about  the  size  of  a  hazlenut,  remains  undissolved  ;  chlorine  water 
of  known  strength  is  added,  until  the  blue  color  of  the  chloro- 
form just  disappears,  when  6  equivs.  CI.  have  been  used  for  1  eq.  L 
By  more  chlorine  water,  the  chloroform  turns  yellow,  orange 
yellow,  and  yellowish-white,  when  2  CI.  have  been  used  for  1  Br.; 
with  6  CI.  the  yellowish  white  tint  disappears  very  slowly.  The 
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