continuously,  instead  of  beinj:;'  voided  at  intervals  as  in  the  jireceding 
experiments.  U  will  be  noticed  that  the  percentage  of  haemoglobin 
in  the  urine  voided  in  the  first  seven  experiments  is  less  than  that  in 
the  blood  plasma  (Table  36)  ;  in  Observation  8  the  same  is  also  noted, 
but  in  Observations  g  and  10  this  relation  is  reversed  in  the  sense  that 
the  maximum  percentage  of  haemoglobin  in  the  urine  is  considerably 
higher  than  the  corresponding  percentage  in  the  blood  plasma.  A 
better  comparison  is,  however,  made  if  curves  are  constructed,  the 
ordinates  of  which  denote  percentages  of  haemoglobin  and  the 
abscissae  periods  of  time.  This  is  done  in  Figs.  2  to  9. 
•/.of 
hb' 
hl> 
o  S  to  7S  20  zs  hooM 
Fig.  3.  I'txp.  4,  Table  35.  I'txperiniental  haeinoglobinaeinia  of  rabbit. 
Percentage  of  dissolved  haemoglobin  in  blood  plasma  and  urine. 
In  most  of  these  curves  (Figs.  2  to  0)  the  percentage  of 
haemoglobin  in  the  plasma  appears  first  greater,  and  subsequently 
less,  than  that  in  the  urine.  In  Figs.  7,  8  and  9,  however,  it  is  seen 
that  the  percentage  of  haemoglobin  in  the  urine  in  reality  at  the 
beginning  of  the  experiment  quickly  rises  till  it  considerably  e.xceedi 
that  in  the  plasma,  after  which  it  declines  again  with  the  latter.  Hw 
greatest  difference  was  observed  in  Experiment  9  in  which  the 
percentage  of  haemoglobin  in  the  urine  became  at  one  time  as  much 
as  7  per  cent.,  while  that  111  the  blood  plasma  was  only  0'54  per  cent 
