382  Gleanings  from  the  German  Journals.  {^£3jg!mm 
Schmidt's  Dialyzed  Albumen,  no  longer  coagulating  when  heated  nor 
causing  a  reaction  with  metallic  salts. — Phar.  Post,  May  16,  p.  156. 
Small  Ice  Apparatus. — Prof.  Reichardt  recommends  a  small  appa- 
tus  made  of  strong  sheet  iron,  by  means  of  which  250  to  300  grams 
of  solid,  transparent  ice  can  be  frozen  in  5  or  10  minutes,  in  hot  sum- 
mer, at  a  trifling  expense.  The  apparatus  consists  of  two  cylinders, 
the  inner  one  of  which  is  filled  with  water  of  10  to  20°C,  and  rotates 
in  the  outer  one,  which  contains  a  frigorific  mixture,  consisting  of  1 
kilo  of  powdered  ammonium-nitrate  and  1  liter  of  water.  The  ice 
can  be  easily  removed  from  the  inner  vessel  after  dipping  the  latter 
into  hot  water,  while  the  ammonium-nitrate  can  be  regained  in  a  pure 
state  by  filtering  and  evaporating  to  dryness. — Archiv  d.  Phar.,  May, 
1878,  p.  446. 
Determination  of  Fat  and  Water  in  Milk. — W.  C.  Heraeus 
uses  a  short  and  reliable  process,  which  is  as  follows  :  A  shallow  silver 
dish,  8  cm.  long,  2  cm.  wide,  and  1  cm.  deep,  containing  a  little  glass 
and  10  grams  of  milk,  is  placed  into  an  iron  gas-pipe,  which  is  con- 
nected either  with  a  good  chimney  or  with  a  Bunsen  suction-tube  ', 
another  pipe  containing  burned  lime  is  attached,  and  air  heated  to  350 
C.  is  passed  over  the  lime  and  through  the  pipe  containing  the  milk  ; 
the  latter  will  be  dry  in  the  course  of  half  an  hour.  The  difference 
in  weight  indicates  the  water,  and  light  petroleum  benzin  extracts,  from 
the  residue  the  fat. — Archiv  d.  Phar.,  May,  1878,  p.  443. 
Hydrochlorate  of  pilocarpina  is  recommended  as  a  valuable  sub- 
stitute for  the  more  expensive  physostigmia  salt.  It  is  in  white  crys- 
tals, and  forms  a  double  salt  with  platinum,  crystallizing  handsomely. 
It  is  also  frequently  preferred  to  eserina  as  a  myotic,  and  when  injected 
hypodermically  is  considered  a  never-failing  diaphoretic,  having,  how- 
ever, sometimes  very  unpleasant  emetic  effects,  and  always  increasing 
saliva  secretion. — Phar.  Post,  May,  1878,  p.  156,  from  Gehes  Ber. 
Phloroglucin,  a  substance  existing  in  various  combinations  in  the 
vegetable  kingdom,  was  discovered  by  Wiesner  to  be  a  very  delicate 
reagent  for  ligneous  tissue.  One  drop  of  a  solution  containing  J  per 
cent,  of  it  will  cause  a  beautiful  bright  red  coloration  on  a  piece  of 
pine  wood  on  the  addition  of  a  drop  of  hydrochloric  acid. — Chem.  Cen- 
tralbl.,  May  15,  from  Polyt.  Jour. 
