372  Practical  Notes  from  Various  Sources.     { "^"jijy 'issr"' 
iiished  the  following  formula  for  the  new  German  Pliarmacopoeia : 
Dissolve  powdered  sugar  9  parts  in  water  9  parts;  add  solution  of 
ferric  chloride  (sp.  gr.  1"280  to  1'282,  containing  10  per  cent,  iron) 
30  parts;  afterwards  gradually  and  with  continued  stirring,  a  solution, 
prepared  with  heat  and  allowed  to  cool,  of  sodium  carbonate  24  })arts 
in  water  48  parts.  When  the  evolution  of  carbonic  acid  gas  has 
ceased,  add  gradually  caustic  soda  solution  (sp.  gr.  1*159  to  1'163, 
containing  15  per  cent,  of  NaOH)  24  parts.  When  clear,  add  to  the 
liquid  sodium  bicarbonate  9  parts  and  dilute  at  once  with  boiling 
water  600  parts,  set  aside,  remove  the  clear  liquid  with  a  syphon, 
mix  the  precipitate  twice  with  boiling  water  400  parts ;  after  subsi- 
dence syphon  off  the  liquid;  finally  collect  the  precipitate  upon  a 
moist  strainer,  wash  it  with  hot  water  until  the  filtrate  is  not  precipi- 
tated, but  merely  rendered  opalescent  with  silver  nitrate,  and  express. 
Mix  the  precipitate  in  a  porcelain  dish  with  powdered  sugar  50  parts, 
evaporate  in  a  steam- bath  to  dryness,  stirring  constantly,  and  triturate 
the  residue  with  sufficient  sugar  to  make  the  weight  equal  to  100  parts. 
It  in  a  red-brown  powder  of  a  sweet  ferruginous  taste,  contaius  3 
per  cent,  of  iron  and  yields  with  20  parts  of  hot  water  a  clear  red- 
brown  solution  which  is  not  altered  by  potassium  ferrocyanide,  but  on 
the  further  addition  of  hydrochloric  acid  yields  at  first  a  dingy  green, 
afterwards  a  blue  precipitate.  If  2  grams  of  the  powder  aie  ignited, 
the  residue  treated  with  boiling  hydrochloric  acid,  the  filtrate  oxidized 
with  potassium  chlorate  and  heating,  and  the  cold  liquid  mixed  with 
1  gram  of  potassium  iodide,  and  digested  for  an  hour  in  a  stoppered 
bottle,  the  mixture,  in  the  presence  of  a  little  solution  of  iodide  of 
starch,  must  require  from  10  to  10*7  cc.  of  tenth  normal  solution  of 
sodium  thiosulphate  to  combine  with  the  separated  iodine. — Arch.  d. 
Fhar.,  April,  1882,  p.  289-291. 
Alhuminated  ferrous  horotartrate  is  recommended  by  Carlo  Pavesi 
as  an  antiseptic  and  antifermentative  and  as  possessing  sedative  prop- 
erties. It  is  prepared  by  mixing  in  a  porcelain  dish  finely  powdered 
boric  acid  1  part  and  tartaric  acid  1  part  with  iron  filings  2  parts  and 
sufficient  water  to  form  a  liquid.  The  mixture  is  gradually  heated  to 
212°F.,  and  then  allowed  to  cool.  Fresh  egg  albumen  6  parts  is  now 
added  and  the  whole  well  mixed  until  it  is  reduced  to  a  homogeneous 
mass,  which  it  set  aside  for  a  week  at  a  temperature  not  exceeding 
76°F.,  and  occasionally  stirred;  it  is  then  filtered  and  the  filtrate 
evaporated  below  95°F.  to  dryness,  and  powdered. 
