Am'May^i886arm'}       Gleanings  from  Foreign  Journals.  247 
H20,  in  the  same  way  as  magnesium  salicylate  from  Cadmium  sulphate. 
Manganesium  salicylate,  Mn(C7H5Os)2  -f  2  H20  is  prepared  like  barium 
salicylate,  from  magnesium  carbonate. — Phar.  Rundschau,  xii,  p.  213. 
To  filter  large  quantities  of  water,  Coccone  proposes  to  filter  the 
water  through  a  layer  (about  25  or  35  cm.  thick)  of  a  mixture  of  1 
part  of  oxide  of  iron  and  2  parts  of  sand. — Phar.  Rundschau,  xii, 
p.  213. 
To  remove  grease  spots  from  fabrics,  benzol-magnesia  (prepared 
by  rubbing  calcined  magnesia  with  benzol)  is  recommended.  Old 
spots  must  be  rubbed  several  times  with  the  mixture  before  the  spots 
disappear. — Phar.  Zeitschrift  fur  Russland,  xxv,  p.  123. 
Tests  for  Lanolin. — Messrs.  Benno  Jaffe  and  Darmstaedter  give  the 
following  tests  for  lanolin: — (1.)  2  or  3  grains  of  lanolin  and  10  c.c. 
of  a  30-per-cent.  solution  of  caustic  soda  are  put  in  a  flask,  and  the 
mixture  warmed;  red  litmus  paper  placed  over  the  flask  should  not 
turn  blue.  A  lanolin  containing  ammonia  is  to  be  condemned.  (2.) 
If  10  grains  of  lanolin  are  heated  in  a  porcelain  capsule  with  50  gm. 
of  distilled  water,  the  lanolin,  when  melted,  floats  on  top  of  the  water 
and  remains  as  a  clear  sediment  on  congealing.  Impure  lanolin  pro- 
duces a  spongy  mass  which  does  not  become  clear  when  treated  in  this 
way.  (3.)  The  water  used  in  the  above  reaction,  when  evaporated, 
should  be  free  from  glycerin.  (4.)  If  lanolin  is  kneaded  under  water 
it  takes  up  over  100  per  cent,  of  water  without  becoming  soapy  to  the 
touch,  and  when  rubbed  in  a  mortar,  it  does  not  slip  off  the  pistil 
or  spatula. — Schweiz.  Wochenschrift,  1886,  p.  88. 
Cocaine  Test. — Dr.  F.  Giesel  states  that  the  sulphuric  acid  test  for 
cocaine  is  not  always  reliable,  and  proposes  the  following  test.  If  1 
centigram  of  cocaine  hydrochlorate  is  dissolved  in  1  or  2  drops  of 
water,  and  about  1  c.c.  of  a  3-per-cent.  solution  of  potassium  perman- 
ganate added,  a  violet  precipitate  is  produced,  at  ordinary  temperature, 
containing  but  a  trace  of  manganesium  binoxide,  and  when  boiled  no  odor 
of  bitter  almonds  is  perceptible. — Schweiz.  Wochenschrift,  1886,  p.  88. 
Cocaine  Benzoate. — Bignon  states  that  the  benzoate  of  cocaine  is 
preferable  to  the  hydrochlorate;  the  anaesthesia  produced  by  the  ben- 
zoate is  more  durable,  and  when  applied  to  wounds  it  is  painless. 
1  gm.  of  the  crystallized  benzoic  acid  is  saturated  by  3  gm.  of  cocaine. 
A  solution  of  1:20  can  be  prepared  by  saturation  when  wanted. — 
Bulletin  Commercial,  February,  1886-88. 
Solution  of  Caffeine  for  Hypodermic  Injection. — Owing  to  the  in- 
