AmNov.r,'i889arm'}      Gleanings  from  the  German  Journals.  561 
require  that  the  amount  of  free  fat  acid  contained  in  the  oil  shall  not 
exceed  4  to  5  per  cent.,  and  that  the  oil  in  contact  with  nitric  acid 
of  1'40  shall  form  an  albuminous  ring  in  five  hours. — J.  de  Ph. 
oVAnv.;  J.  de  ph.  et  de  eh.,  Sept  1. 
Zinc  Ointment  with  Mucilage  of  Gum  Tragacanth. — M. 
P.  Vigier  proposes  the  following  as  a  homogeneous  and  unalterable 
preparation:  Vaselin,  30  gm.;  oxide  of  zinc,  4  gm.;  gum  tragacanth, 
pulv.,  2  gm.;  distilled  water,  10  gm.;  tincture  of  benzoin,  30  drops  ; 
powdered  soap,  25  cgm.  The  oxide  of  zinc  should  be  triturated  in  a 
mortar  with  the  vaselin  and  added  to  the  tragacanth  mucilage  previ- 
viously  prepared  in  another  mortar.  The  soap  is  then  introduced, 
and,  finally,  the  tincture.  It  should  be  kept  in  closed  jars. — Soc.  de 
Phar.  de  Paris,  July  3. 
Nikolsky's  Application  for  Burns. — Tanin  and  alcohol  ~&k,  1 
part ;  ether,  8  parts.  Paint  the  burned  portions  two  or  three  times 
daily,  first  washing  with  an  antiseptic  solution  and  sprinkling  lightly 
with  iodoform. — Ag.  des.  Ph.  Busses;  Nouv.  rem.,  Aug.  24. 
GLEANINGS  FROM  THE  GERMAN  JOURNALS. 
By  Feank  X.  Moerk,  Ph.  G. 
The  Coloring  Principles  of  Chlorophyll. — By  a  study  of  the  litera- 
ture and  experimental  confirmation  of  the  statements  Hansen  con- 
cluded that  chlorophyll  was  a  mixture  of  two  coloring  principles 
which  were  in  combinations  with  fats  or  similar  substances.  The 
preparation  of  the  coloring  principles  is  best  accomplished  from 
grasses,  exhausted  by  boiling  water  and  dried  in  the  dark.  The 
tincture  from  this  dry  material  is  green  and  in  thin  layers  ruby  red  ; 
it  is  concentrated,  boiled  with  an  excess  of  sodium  hydrate  for  three 
hours,  then  treated  with  gaseous  COz  and  evaporated  to  dryness. 
Ether  takes  up  the  yellow  principle  and  on  evaporation  leaves  it  in 
an  impure  state  as  a  coral  red  mass  On  extracting  this  with  a  mix- 
ture of  ether  and  petroleum  ether  (1  :  1)  and  evaporating  in  the  dark, 
the  yellow  coloring  principle  is  obtained  as  orange-red  needles  or 
rhombic  plates,  free  from  nitrogen,  insoluble  in  water,  soluble  in 
alcohol,  ether,  chloroform  and  benzol  with  dark  yellow  color,  in  car- 
bon bisulphide  with  a  brick-red  color  ;  it  possesses  great  coloring 
power.  Exposed  to  light  it  changes  to  a  colorless  substance  giving 
the  cholesterin  reaction  ;  with  H2S04  it  gives  a  black-blue  color. 
