AmbJe°cUri87h6arm*j  Gleanings  from  the  Foreign  Journals.  543 
wonderfully.  Orchis  morio,  Orchis  militaris,  Syringa  alba,  Asperula 
odorata,  Pinguicula  vulgaris,  Gymnadenia  conopsea,  Rhinanthus,, 
Cephalanthera,  CEnothera  biennis,  Verbascum  thapsus,  Petasites  albus, 
Juglans  regia,  Pedicularis  palustris,  all  of  which  generally  turn  black  in 
drying,  keep  their  colors,  especially  the  red  and  violet  ones. —  H.  M. 
W.,  Ny  Pharm.  Tid.,  1876,  p.  328. 
New  -Method for  the  Volumetric  Estimation  of  Silver. — Acid  solutions 
of  silver  produce,  with  sulphocyanides,  a  white,  curdy  precipitate, 
resembling  chloride  of  silver  in  appearance.  In  the  presence  of  a  ferric 
salt  a  blood-red  coloration  will  be  produced  on  the  addition  of  every 
drop  of  the  sulphocyanide  solution,  and  quickly  disappear  as  long  as 
any  silver  remains  in  solution.  The  permanent  appearance  of  the  red 
color  indicates  the  complete  precipitation  of  the  silver.  This  method^ 
which  has  been  proposed  by  Prof.  J.  Volhard,  of  Munich,  is  capable 
of  very  extended  application,  particularly  for  the  estimation  of  chlo- 
rine, bromine,  iodine  and  similar  bodies,  which  are  precipitated  by 
silver  from  acid  solutions. — Phar.  Cent.  Halle,  No.  39,  from  four.  f. 
prakt.  Chem, 
Recovery  of  Silver  from  Solutions  of  Silver  Cyanide  and  on  the  Reduction 
of  Silver  Chloride. — Ernst  Von  Bibra  has  examined  the  various  methods 
proposed,  and  recommends  to  precipitate  the  solutions  with  sulphuric 
acid,  ignite  the  precipitate,  digest  with  nitric  acid  and  precipitate  by 
hydrochloric  acid.  The  precipitated  silver  chloride  is  treated  by 
Grager's  process  by  adding  ammonia  and  digesting  with  zinc.  The 
greyish  or  whitish  precipitate  gradually  becomes  deep  grey,  almost 
black,  and  then  contains  zinc,  which  is  extracted  by  dilute  sulphuric 
acid,  or  better,  by  boiling  with  dilute  hydrochloric  acid,  when  pure 
silver  is  left  behind. — Jour.  f.  rpakt.  Chem.,  1876,  pp.  185-192. 
Notes  on  Sumbul. — The  Euryangium  sumbul  is  found  in  large  quantities 
in  the  neighborhood  of  Chabarowka,  a  military  post  on  the  river  Amur, 
in  the  province  of  Kusten,  East  Siberia,  9,000  versts  from  St.  Peters- 
burg. It  is  a  perennial  umbellifer,  and  grows  to  the  height  of  from  3 
to  5  feet.  Its  root  is  branched,  fleshy,  about  11  inches  in  circumfer- 
ence at  the  base,  and  3!  inches  in  diameter,  with  numerous  rootlets, 
and  covered  with  a  brown  bark.  The  root  has  a  strong  smell  of  musk,, 
which,  by  moistening  with  water,  is  considerably  increased.  The 
stalk  of  the  plant  is  always  fleshy,  equal  in  circumference  at  the  base 
