496  American  Pharmaceutical  Association.  {A™'cfober.Ii90Lm' 
lized  permanganate  in  peroxide  of  hydrogen  acidified  by  one-eighth 
volume  concentrated  sulphuric  acid.  Since  two  atoms  of  permanga- 
nate produce  5  molecules  of  oxygen  gas  (half  from  each  of  the 
permanganate  and  peroxide,  it  follows  that  316  milligrams  give  5 
times  24  or  120  c.c.  of  gas  under  the  standard  condition  of  this 
system.  Hence  38  c.c.  oxygen  gas  are  yielded  per  decigramme  of 
permanganate.  The  determinations  made  show  that  the  values 
chemically  produced  agree  exactly  with  the  requirements  of  the 
reduction  by  calculation  from  temperature  and  pressure. 
The  Gross  and  Histological  Characters  of  Powdered  Coto, 
Paracoto,  Wintera  and  Canella. 
By  Albert  Schneider. 
In  summing  up  the  histological  comparison  of  the  four  vegetable 
powders,  the  author  gives  the  following  distinguishing  characteris- 
tics for  each  : 
(1)  Coto. — Granular  oil  globules. 
(2)  Paracoto. — Absence  of  above  granules. 
Another  difference  between  coto  and  paracoto  is  the  behavior 
with  nitric  acid  (concentrated  or  40  per  cent.).  Place  a  pinch  of 
the  powders  upon  a  slide  and  add  a  drop  or  two  of  the  acid.  The 
coto  turns  a  deep  red,  while  the  paracoto  becomes  yellowish,  which 
finally  turns  to  a  dirty  yellowish  olive  green. 
(3)  Wintera. — No  oil  globules  or  very  large  sclerenchyma  cells. 
(4)  Canella. — Numerous  bright  yellow  resin  masses,  crystals  and 
unequally  thickened  sclerenchyma  cells.  Of  course  canella  is  at 
once  distinguished  from  the  other  powders  by  its  color. 
The  Pharmacologic  Assay  of  Preparations  of  the  Suprarenal 
Glands. 
By  E.  M.  Houghton. 
The  author  has  devised  a  method  based  upon  the  changes  pro- 
duced in  the  blood  pressure  of  the  corotid  artery,  when  variable 
quantities  of  a  given  preparation  of  the  suprarenal  glands,  dissolved 
in  slightly  acidulated  water,  the  inert  substance  being  removed  as 
far  as  possible,  are  injected  into  the  femoral  or  jugular  vein  of  an 
anaesthetized  dog  or  other  animal. 
