50  .....  ,  /  ’  I  ’  ......  I  ......  _  - 40  I  ’  ’\  I  \ 12  I  y’  I  \  ~  I  \  \  .W.  30  I  \  (.)  II  ’  z  <(  CD  ’  er  0  ’  U)  ......  CD  20  - <(  "-~  I  -- I  -- 10  .  ---- - I  ----- I  I  . $_{I }$ I  0  4000  4500  5000  5500  6000  6500  0  WAVELENGTH  (A)  COMPOSITION, METHOD AND  DEVICE FOR DETERMINING  BILIRUBIN AND UROBILINOGEN  Filed Jan. 2, 1973  J.  w.  FRASER, JR.,  ET AL  3,814,586  June  4, 1974 