i48 
Progress  in  Pharmacy. 
(Am.  Jour.  Pliarm. 
I     March,  L909. 
by  means  of  nitric  acid  and  adds  this  solution  to  a  nitric-acid  solu- 
tion of  the  suspected  material  previously  treated  with  ammonia. — 
Compt.  Rend.,  v.  147,,  pp.  744-/45- 
Mercury  Sozo-iodolate. — W.  A.  Puckner  points  out  that  a  solu- 
tion of  mercury  sozo-iodolate  which  was  submitted  for  examination 
contained  sodium  and  mercury  as  the  essential  ingredients,  the 
mercury  sozo-iodolate  being  soluble  in  solutions  of  iodides,  bromides 
or  chlorides.  From  an  estimation  of  the  mercury,  the  sodium  and 
the  iodine,  he  concludes  that  100  c.c.  of  the  solution  contained 
approximately  one  gramme  of  mercury  sozo-iodolate  and  somewhat 
less  than  3  grammes  of  sodium  iodide,  so  that  it  would  represent 
the  activity  of  approximately  0.8  gramme  of  mercuric  iodide  and 
3  grammes  of  sodium  iodide. — Jour.  Am.  M.  Assoc.,  1909,  v.  52, 
P-  574- 
The  permanency  of  permanganate  solutions  has  been  further 
investigated  by  J.  W.  Hammer  (Svensk.  farm.  Tidskr.),  who  found 
that  after  the  destruction  of  the  organic  matter  in  the  water  or  on 
the  walls  of  the  container  the  undecomposed  portion  of  the  solution 
is  indefinitely  permanent,  so  that  a  titrimetric  solution  which  is  pre- 
served from  light  and  contamination  may  be  used  indefinitely. — 
Pharm.  Zentralb.,  1908,  v.  50,  p.  1023. 
Zinc  Permanganate. — An  examination  of  zinc  permanganate 
made  in  the  chemical  laboratory  of  the  American  Medical  Associa- 
tion showed  that  the  commercial  product  varied  from  72  to  97 
per  cent.  pure.  Tablets  of  zinc  permanganate  were  examined  and 
found  to  contain  from  86  to  89  per  cent,  of  the  amount  claimed  by 
the  manufacturer. — Jour.  Am.  M.  Assoc.,  1909,  v.  52,  pp.  488-489. 
Xickel  Culinary  Utensils. — The  harmlessness  of  nickel  cooking 
utensils  has  been  demonstrated  by  two  Russian  investigators  who 
studied  the  solvent  action  of  such  fluids  as  are  likely  to  come  in 
contact  with  the  metal,  and  the  probable  ill  effects  of  the  resulting 
solutions  of  nickel  on  the  animal  organism.  Their  results  appear  to 
indicate  that  when  taken  for  a  long  period  of  time  in  doses  much 
larger  than  can  be  derived  from  nickel  cooking  vessels  the  metal 
and  its  salts  are  quite  devoid  of  harmful  effects. — Abstract  in  Pharm. 
Jour..  London,  1909,  v.  28,  p.  6. 
Methyl  Red  as  an  Indicator  of  Extreme  Delicacy. — Rupp  and 
Loose  (Berichte,  1908,  p.  3905)  recommend  the  use  of  methyl  red 
as  an  indicator  of  great  delicacy  with  1  /](M)  X.  solutions.  Methyl 
red  is  defined  as  an  azo  combination  of  o-amidobenzoic  acid  and 
