634 
Pomegranate  Rind. 
{Am,  Jour.  Pharm 
December,  189T. 
It  seems  likely  to  me,  in  studying  the  vegetation  of  hot  springs, 
notwithstanding  the  statements  of  Prof.  Ernst  Haeckel,  of  Jena, 
in  his  interesting  work,  u  Systematische  Phylogenie  der  Protisten  und 
Pflanzen,"  that  the  early  forms  of  life  on  this  globe  were  green  uni- 
cellular algae,  and  from  these  by  retrogression  and  development 
other  forms  have  sprung,  animal  life  appearing  later  than  plant,  it 
seems  to  me,  I  repeat  it,  that  we  must  look  to  the  hot  springs  for 
the  most  primitive  forms  of  life,  because  the  temperature  conditions 
are  such  as  more  nearly  to  simulate  the  conditions  existing  when 
this  world  of  ours  was  in  a  highly  heated  state,  when  seismic  phe- 
nomena were  the  rule  rather  than  the  exception.  It  would  be  neces- 
sary in  order  to  establish  this  proposition  to  investigate  compara- 
tively the  vegetation  of  all  the  hot  springs  of  the  globe,  before  it 
would  be  safe  to  make  such  a  general  declaration  as  to  the  origin 
of  vegetal  life. 
The  above  ecological  sketch  sufficiently  discloses  the  salient  char- 
acters of  the  interesting  geysers  and  hot  springs  of  the  Yellowstone 
Park.  In  preparing  this  article,  the  writer  has  endeavored  to  give 
the  results  of  personal  observation  on  the  spot  during  eight  days  of 
August,  1897.  He  has  been  materially  aided  in  its  preparation  by 
the  following  papers  and  books,  which  give  a  somewhat  more 
detailed  account  of  the  Yellowstone  Wonderland: 
BIBLIOGRAPHY. 
1887-88,  Weed.    Ninth  Annual  Report  U.  S.  Geological  Survey,  p.  619. 
1895,  Chittenden.   The  Yellowstone  National  Park,  Historical  and  Descrip- 
tive. 
1897,  Haynes  and  Guptill.    Guide  to  Yellowstone  Park. 
1897,  Davis,  in  Science,  N.  S.,  I.,  p.  145  (July  30). 
1897,  Tilden,  in  Botanical  Gazette,  September,  1897. 
University  of  Pennsylvania,  November  16,  1897. 
J 
POMEGRANATE  RIND. 
By  Henry  Trimble. 
Contribution  from  the  Chemical  Laboratory  of  the  Philadelphia  College  of 
Pharmacy.  No.  171. 
At  this  season  of  the  year  pomegranate  fruit  is  frequently  seen 
on  the  market  stalls  of  Philadelphia  and  other  Northern  cities,  and 
is  brought  here  from  Spain.  Small  quantities  of  the  fruit  are  raised 
in  the  Southern  States  and  in  California,  but  so  far  it  has  never 
attained  much  popularity  with  us,  partly,  no  doubt,  on  account  of 
