438  IODINE  IN  MINERALS,  PLANTS  AND  ANIMALS. 
quantity  of  urine  passed  is  very  small,  often  only  a  few  cubic 
centimeters  during  several  days ;  in  the  latter,  on  the  contrary, 
very  great,  amounting  to  1200  or  1500  cubic  centimeters  in 
twenty-four  hours. 
It  follows  from  these  facts,  perhaps  with  certainty,  that  the 
quantity  of  urea  excreted  under  certain  circumstances  and  within 
a  certain  time,  cannot  be  taken  as  the  direct  measure  of  meta- 
morphosis in  the  tissues,  even  when  the  urine  does  not  contain 
any  other  nitrogenous  constituent.  Still  it  will  always  be  the 
most  important  element  for  ascertaining  its  amount,  and  it  will 
only  be  necessary  to  study  more  closely  the  influences  exerted 
upon  its  formation  and  excretion,  towards  the  elimination  of 
which  I  hope  to  have  furnished  some  contribution. — London 
Pharm.  Journ.,  from  Annalen  der  Chemie  und  Pharmacie. 
ON  THE  FREQUENT  PRESENCE  OF  IODINE  IN  MINERALS, 
PLANTS,  AND  ANIMALS,  AND  THE  VARIOUS  TESTS  FOR  ITS 
DETECTION. 
By  E.  Riegel.* 
Recent  investigations  have  shown  that  iodine  occurs  in  small 
quantities  much  more  frequently  than  was  hitherto  supposed,  and 
a  statement  of  the  various  cases  in  which  its  presence  has  been 
observed,  may  have  some  degree  of  interest  for  many.  The 
marine  plants  in  which  iodine  was  first  discovered,  appear  to 
contain  the  largest  quantity : 
Per  centage  of  Iodine  in  the  dry  plant. 
Fucus  filium  ....  0-0894 
"  digitatus  ....  0-135 
"  saccharinus  .  .  .  0-230 
"  vesiculosus  .  .  .  0-001 
"  saccatus  ....  0-124 
"    siliquosus  .       .       .  0-142 
Fucus  nodosus  and  lorcus  contain  a  little  iodine,  so  likewise 
fucus  cartilagmeus,  membranaceus,  rubeus  and  palmatus,  accord- 
ing to  H.  Davy,  Gaultier  and  Fyfe ;  spJicerococcus  crispus,  accord- 
[*We  have  published  several  articles  in  reference  to  this  subject,  but  now 
introduce  Dr.  RiegePs  article  as  being  a  general  compendium  of  what  has 
been  written  and  observed. — Editor  Am.  Journ.  Pharm.] 
