374  Practical  Notes  from  Various  Sources.     { ^'"ju^y.^'issr'"' 
tion  upon  a  cold  glass  rod.  The  liquid  is  slowly  cooled  and  filtered, 
yielding  a  bright  golden-yellow  filtrate  which  contains  between  '5  and 
•7  per  cent,  of  iodoform. — Pkar.  Zeitung,  April  15,  1882. 
Solubility  of  Iodoform. — Dr.  Vulpius,  in  several  communications, 
published  in  "Archiv  der  Pharmacie/^  gives  the  following  information : 
Hot  glycerin  dissolves  1  per  cent,  of  iodoform,  more  than  one-half  of 
which  separates  on  cooling.  Hot  olive  oil  takes  up  about  20  per  cent, 
of  iodoform,  of  which  2  per  cent,  remains  in  solution  after  cooling. 
The  solution  in  chloroform  rapidly  becomes  dark  red,  probably  in 
consequence  of  a  mutual  reaction  between  the  two  compounds.  With 
collodion  a  10  per  cent,  solution  of  iodoform  can  be  readily  prepared 
by  agitating  the  latter  with  a  little  ether  and  afterwards  with  the 
collodion,  and  even  a  15  per  cent,  solution  may  be  made.  At  the 
ordinary  temperature,  100  parts  of  the  following  liquids  dissolve  of 
iodoform  the  amounts  indicated  : 
Petroleumbenzin  1  part,  benzol  1'5  part,  absolute  alcohol  4  parts, 
oil  of  turpentine  4  parts,  oil  of  lavender  7  parts,  oil  of  cloves  8  parts, 
oil  of  fennel  9  parts,  oil  of  lemon  9  parts,  oil  of  rosemary  9  parts,  oil 
of  cinnamon  14  parts,  oil  of  caraway  16  parts,  ether  16  parts. — Archiv 
der  Fhar.,  Jan,  1882. 
lodofoi^m  Pencils  for  fistulas  are  prepared  by  triturating  together 
finely  powdered  iodoform  and  butter  of  cacao,  of  each  2  grams,  and 
rolling  the  mass  out  into  five  pencils  of  2  millimeters  thickness,  which 
are  dusted  with  lycopodium. — Phar.  Centralhalle,  1882,  p.  193. 
Woelfe7^^s  Iodoform  Gauze. — Dissolve  60  grams  of  rosin  in  1,200 
grams  strong  alcohol  and  add  50  grams  of  glycerin;  soak  in  this 
liquid  6  meters  of  gauze  deprived  of  fat,  express,  and  when  about  half 
dry  dust  upon  it  50  grams  finely-powdered  iodoform. — Ibid. 
Iodoform  Toothpaste  for  application  to  exposed  nerves  is  recom- 
mended by  Schaff  on  account  of  its  anaesthetic  and  mild  caustic  proper- 
ties, without  producing  irritation  or  inflammation. 
It  is  prepared  by  triturating  powdered  iodoform  and  kaolin,  of  each 
4*0  grams,  carbolic  acid  0*5  grams,  oil  of  peppermint  10  drops  with 
sufficient  glycerin. — Ibid.  p.  147. 
Preparation  of  Atropine. — 1,000  grams  powdered  belladonna  leaves 
are  exhausted  by  displacement  with  84  per  cent,  alcohol ;  the  tincture 
is  distilled  and  the  extract  treated  with  five  times  its  volume  of  water; 
the  aqueous  solution  is  filtered  from  the  resin  and  fat,  evaporated  to 
300  cubic  centimeters,  mixed  with  an  excess  of  ammonia,  and  the 
