Am'oJc°tUri92iiarm'  \  Methyl-Orange  675 
"As  it  is  with  the  lowly  peasant  man  or  woman,  as  it  is  with 
the  emperor  on  his  throne,  or  a  prince  of  the  Church,  so  it  is 
with  the  scientist  or  the  researcher.  Contrast  the  influences  in- 
tended by  Perkins,  who,  at  the  end  of  his  life,  received  his  richly 
earned  honors  with  bowed  head  and  in  humble  voice:  'What  is 
it  that  I  have  not  received?  Not  unto  me,  O  Lord,  not  unto  me, 
but  unto  thy  great  name  be  all  the  praise.' 
"Contrast  him,  I  say  with  Schweitzer,  the  scientist  and  re- 
searcher, representative  of  the  profane  application  of  his  science  in 
peace  and  war,  and  in  the  shadow  of  that  contrast,  and  in  the 
humility  and  in  the  shame  which  we  should  feel,  let  us  look  forward 
to  the  day  when  the  English  and  American  chemists  can  meet  again, 
with  the  evidence  about  us  of  our  atonement  for  our  neglect,  evidence 
of  permanent  peace  in  all  the  world,  of  a  higher  and  more  equal 
standard  of  living  for  all  our  peoples  and  of  a  great  marching  for- 
ward in  our  battle  against  disease.  Until  that  day  let  no  man  write 
his  epitaph." 
METHYL-ORANGE  AS  AN  INDICATOR  IN  PRESENCE 
OF  INDIGO-CARMINE.* 
By  Professor  Frank  X.  Moerk. 
Methyl-orange  used  with  the  more  dilute  or  weaker  volumetric 
solutions  for  accurate  work  should  be  compared  with  a  blank  test  to 
correct  for  its  alkalinity  and  also  to  reduce  error  because  of  the 
gradual  color  change. 
In  a  pamphlet  issued  in  191 4  by  the  Wilckes,  Martin  Wilckes 
Company,  of  New  York,  on  "Methods  for  determining  the  strength 
and*  impurities  in  Acid  Calcium  Phosphate"  a  formula  is  given  for 
preparing  an  indicator  for  the  "determination  of  free  phosphoric 
acid"  by  the  use  of  which  the  change  in  color  is  more  sharply  dis- 
tinguished ;  25  cc.  of  a  solution  of  Methyl-orange  ( 1  :  iodo)  are 
mixed  with  5  cc.  of  water  containing  0.09  Cm.  of  sodium  suiph- 
indigotate  (indigo-carmine). 
Looking  up  the  literature  of  this  mixture  as  an  indicator,  Chem. 
Abstr.  1908,  page  165,  gives  reference  to  an  article  published  by 
R.  Luther  in  Chem.  Ztg.,  1907,  page  1172,  in  which  priority  for  the 
*Read  before  meeting  of  Pennsylvania  Pharm.  Asso.  June,  1921. 
*Chemical  Laboratory  Philadelphia  College  of  Pharmacy  and  Science, 
June  10,  1921. 
