ABSTRACT  OF  A  REPORT  ON  THE  PITAYO  CINCHONAS. 
473 
Richardson  said  that  the  water  containing  the  persulphate  of 
iron  was  the  best  chalybeate  aperient  he  had  ever  used.  It 
remained  fresh  for  weeks,  and  in  appearance  resembled  to  per- 
fection a  natural  mineral  chalybeate  water.  It  differed,  how- 
ever, from  such  water,  in  that  it  contained  a  little  sugar  and  was 
rich  in  oxygen.  Each  dose  contained  a  grain  of  the  iron  salt. 
The  formula  for  this  water  was  as  follows  : — 
Peroxide  of  hydrogen  .  ^i. 
(Ten  volumes  of  oxygen,) 
Sulphate  of  potassa  .  .  ^ij. 
Chloride  of  sodium  .  .  ^iss. 
Sulphate  of  iron  .  .  grs.  xij. 
Simple  syrup  ....  <§i. 
Water  to        ....  Sxxiv. 
Dose :  Two  fluidounces  to  be  taken  with  as  much  water  as  will 
fill  a  tumbler. 
In  obstinate  cases  of  constipation  with  anasmia,  and  in  cases 
of  asthenic  gout,  this  solution  was  most  useful.  The  advantages 
derived  from  the  peroxide  of  hydrogen  in  these  waters  were 
most  important,  the  peroxide  quickening  the  eliminative  action, 
and  producing  free  secretion  and  excretion. 
In  reply  to  a  question  as  to  the  manufacture  of  these  waters, 
Dr.  Richardson  said  that  any  practitioners,  who  had  the  peroxide 
of  hydrogen,  could  make  the  waters  for  themselves,  but  they 
were  very  efficiently  made  by  Messrs.  Garden  and  Robbins,  of 
Oxford  street,  London. — London  Chem.  News,  September  15, 
1865. 
ABSTRACT  OF  A  REPORT  ON  THE  PITAYO  CINCHONAS. 
By  Mr.  Robert  Cross. 
Mr.  Clements  R.  Markham  having  been  impressed  with  the 
importance  of  procuring  seeds  of  the  species  of  Cinchona  which 
grow  at  and  near  Pitayo,  New  Granada,  obtained  the  sanction  of 
the  Secretary  for  India  to  employ  Mr.  Cross  in  the  service.  Mr. 
Cross  remarks  that  most  persons  who  have  written  on  the  Cin- 
chona of  the  Andes  represent  it  as  flourishing  amidst  perpetual 
torrents  of  rain  and  mist,  and  scarcely  ever  enjoying  a  moment 
of  sunshine.    He  states  that  this  is  a  mistake.    No  Cinchona 
