302 
Current  Literature. 
Am  Jour.  Pharm. 
April,  1918. 
"Ivory"  soap  solution. — E.  M.  Chamot  and  H.  I.  Cole.  (/.  Ind. 
and  Eng.  Chem.,  1917,  9,  969-971)  ;  through  The  Analyst. 
Arsenic  in  Glucose. — The  author  made  a  comparative  study 
of  the  accuracy  of  three  methods  of  determining  small  quantities  of 
arsenic  (in  solutions  free  from  organic  matters),  viz.,  the  Marsh- 
Berzelius,  the  Gutzeit,  and  a  so-called  diaphanometric  method  in 
which  the  arsenic  is  reduced  to  the  elementary  state  by  hypophos- 
phorous  acid  in  presence  of  sulphuric  acid  and  estimated  from  the 
cloudiness  of  the  liquid  in  comparison  with  a  series  of  test  solu- 
tions of  known  arsenic-content  treated  in  the  same  way  at  the  same 
time.  The  possible  error  of  all  three  methods  was  found  to  be  of 
the  same  order,  about  one  tenth  of  the  amount  of  arsenic  deter- 
mined, but  the  Gutzeit  method  is  not  considered  so  trustworthy  as 
the  others  for  quantitative  purposes.  The  diaphanometric  method 
is  somewhat  more  expeditious  than  the  Marsh-Berzelius  method;  it 
is  rendered  inexact  by  the  presence  of  traces  of  nitrates  or  nitrites. 
From  solutions  containing  sugars,  traces  of  arsenic  can,  after  oxi- 
dation with  bromine,  be  completely  precipitated  by  entrainment  in 
precipitates  of  ammonium  magnesium  phosphate  formed  in  the  solu- 
tions. Modifying  a  procedure  described  by  Vuaflart  {Ann.  Falsif., 
1916,  272),  the  author  applied  this  method  to  commercial  glucoses; 
the  phosphate  precipitate  was  dissolved  in  nitric  acid,  all  traces  of 
the  latter  were  then  eliminated  by  evaporation  with  sulphuric  acid, 
and  the  sulphuric  acid  solution  was  used  for  the  determination  of 
arsenic  by  the  diaphanometric  method.  Experiments  described  indi- 
cate that  traces  of  arsenic  in  beer-wort  are  not  eliminated  to  any 
extent  during  fermentation  or  fining  of  the  fermented  beer. — J.  H. 
L. — A.  Kling.  Ann.  Falsif.,  1917,  10,  438-450;  through  the  Journal 
of  the  Society  of  Chemical  Industry. 
MEDICAL  AND  PHARMACEUTICAL  NOTES. 
Foreign  Body  in  the  Eye. — Curran  {Boston  Medical  &  Sur- 
gical Journal,  September  27,  191 7)  states  that  at  the  Norton  Com- 
pany during  the  past  year  there  were  treated  1,300  cases  of  injury 
to  the  eye.  Of  these  90  per  cent,  were  directly  attributed  to  foreign 
bodies.  By  the  rules  of  the  factory  the  employees  are  forbidden 
to  treat  each  other's  eyes,  and  every  man  is  required  to  report  at 
the  shop  hospital  for  every  accident,  however  trivial.  The  method 
of  examining  the  eyes  is  as  follows :  First,  inspect  the  lower  con- 
