350 
ON  THE  DETECTION  OF  IODINE  IN  URINE. 
vent,  and  the  retention  of  a  considerable  part  of  the  alcohol  to 
hold  in  solution  its  active  qualities,  which  are  principally  due  to 
volatile  oil. 
The  following  formula  which  is  proposed  as  a  substitute  for 
those  now  in  use,  not  only  contemplates  an  increase  of  strength 
whereby  the  dose  is  proportionally  reduced,  and  less  alcohol  ad- 
ministered with  each  dose,  but  the  complete  exhaustion  of  the 
drug  with  economy  of  time  and  ease  in  manipulation. 
Fluid  Extract  of  Buchu, 
Take  of  Buchu  in  moderately  fine  powder,  sixteen  ounces. 
Diluted  alcohol  (Alcohol  95  p.  c.  2  parts,  water  1 
part)  a  sufficient  quantity. 
Dampen  the  powder  with  the  diluted  alcohol  and  pack  firmly 
in  a  suitable  displacer,  place  over  the  surface  a  piece  of  perfora- 
ted filtering  paper  and  pour  on  the  diluted  alcohol ;  when  all  of 
the  highly  charged  liquid  (about  one  pint)  has  passed,  remove  it 
and  submit  to  spontaneous  evaporation  until  reduced  to  four- 
teen fluid  ounces ;  continue  the  percolation  until  exhausted  or 
about  one  pint  more  is  obtained,  evaporate  this  at  a  temperature 
of  120°  or  130g  F.  until  reduced  to  two  fluid  ounces,  and  mix  it 
with  the  first  portion.    Filtration  may  be  resorted  to  if  neces- 
sary, but  is  scarcely  requisite. 
Thus  made,  fluid  extract  of  buchu  is  a  dark  olive-brown  liquid, 
possessing  to  the  fullest  extent  the  peculiar  qualities  of  the  drug, 
and  may  be  given  in  doses  from  twenty  to  thirty  minims  repre- 
senting as  many  grains  of  the  substance. — Jour,  and  Trans. 
Md.  Coll.  Phar.  March,  1859. 
ON  THE  DETECTION  OF  IODINE  IN  UKINE. 
By  Prof.  Dr.  X.  Landerer. 
It  is  not  so  easy  as  might  be  supposed,  to  detect  iodine  in  urine ; 
I  was  unable  to  obtain  a  reaction  with  chloride  of  palladium  in 
cases  where,  according  to  my  opinion,  urine  ought  to  have  con- 
tained iodine.  The  excretion  of  iodine  by  urine  seems  to  depend 
on  the  nature  of  the  preparation  administered,  for  the  urine  of 
persons  who  had  been  taking  pills  of  iodide  of  iron  for  a  consi- 
derable time  was  free  of  iodine  and  iron,  though  the  black  co- 
lor of  the  faeces  showed  the  presence  of  iron  therein.   After  the 
