GLEANINGS  FROM  THE  GERMAN  JOURNALS. 
219 
duction  of  the  green  color,  but  also  for  the  healthy  development 
of  plants.  The  chlorophylle  obtained  from  about  a  hundred 
weight  of  grass,  was  freed  from  some  resinous  matter  by  dis- 
solving in  muriatic  acid  and  precipitating  with  water  ;  it  contained 
60.8C.,  6.4H.,  and  32.80,  after  deducting  .037IN  and  -0023 
ashes  which  contained  iron.  Qaercetin  colored  green  by  ses- 
quichloride  of  iron,  showed  in  some  respects  a  similar,  in  others 
a  different  behaviour. — (Ann.  d.  Ch.  u.  Ph.  xxxix.  37 — 45.) 
Influence  of  cyanogen  upon  iodoform. — Gilm  repeated  St. 
Evre's  experiments.  A  cold  alcoholic  solution  of  iodoform 
becomes  reddish-brown  by  cyanogen,  and  gradually  gelatinizes 
from  the  separation  of  floccules.  If  now,  or  from  the  beginning, 
heat  is  applied,  the  filtered  liquid  crystallizes,  and  the  mass  is 
silver-white,  and  possesses  metallic  lustre.  By  re-dissolving  in 
alcohol,  a  few  brown  floccules  remain  undissolved,  and  the 
liquid  yields  golden  yellow  crystals.  These  and  the  former  are 
iodoform  containing  a  small  portion  of  a  cyanogenous  body ; 
bisulphite  of  carbon  dissolves  pure  iodoform. — (Ann.  d.  Ch.  u. 
Ph.  xxxix.  46—49.) 
Quercetine  in  buckthorn  berries. — Professor  P.  Bolley  obtains 
it  by  exhausting  the  berries  with  crude  ether,  evaporating  the 
ether,  precipitating  with  water,  re-dissolving  in  alcohol  and 
evaporating  slowly  ;  the  crystals  produce  a  brick  red  precipitate 
with  sugar  of  lead  and  with  nitrate  of  silver  a  blood  red  color, 
changing  to  violet,  and  finally  reducing  silver,  the  elementary 
analysis  coincides  with  quercetine. — (Ann.  d.  Ch.  u.  Ph.  xxxix. 
54—59.) 
Paraffine  in  boghead  slate. — Merz  obtained  about  J  per  cent, 
by  exhausting  the  alcoholic  extract  with  ether  and  further  puri- 
fying it.  Prof.  Bolley  thinks  it  possible  that  paraflfine  is  not 
found  in  coal  tar,  because  it  does  not  pre-exist  in  the  coal. — 
(Ann.  d.  Ch.  u.  Ph.  xxxix.  61—63.) 
Tannin  in  ether. — Prof.  Bolley  reports  the  results  of  Ott  on 
the  behaviour  of  tannin  to  ether.  Absolute  ether  dissolves  at  5^ 
C.  (41^  F.)  -206  per  cent.,  at  ordinary  temperature,  '384  per  cent, 
tannin  ;  ether  containing  1  per  cent  by  volume  of  water  dissolved 
at  ordinary  temperature  12  per  cent.  The  solubility  increases 
with  the  water,  and  the  tannin  on  dissolving  always  turns  brown 
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