Suppression  o'f  urine  in  blackwater  fever  is  known  not  to  be 
necessaiily  complete,  and  hence  the  term  oliguria  is  sometimes 
employed  to  denote  this  condition,  instead  of  the  more  familiar 
teims  suppression  or  '  anuria.’  A  search  of  the  literature  has  not 
enabled  us  to  find  exact  records  of  the  amounts  of  urine  passed  in 
individual  cases  during  suppression,  but  two  of  our  own  cases  (;a 
and  1 1)  furnish  data  on  this  point.  The  daily  amounts  in  these  two 
cases  are  given  in  Table  41.  and  will  be  seen  to  range  in  Case 
from  iic.cm.  to  4300111.,  and  in  Case  ii  from  8  c.cm.  to  92  ocm. 
The  urine  was  voided  naturally,  but  owing  to  the  small  quantities 
present  in  the  bladder  some  difficulty  was  experienced  in  voiding  it, 
and  it  is  not  certain  that  the  bladder  was  always  completely  emptied. 
In  any  case,  however,  the  daily  variations  were  not  usually 
considerable.  The  average  amount  of  urine  secreted  by  Case  ;a 
was  28  c.cm.*  per  day,  and  by  Case  ii  66  c.cm.  per  day  (Table  42). 
Table  42.  Average  daily  amount  of  urine  pas.sed  during  suppression  of  urine  in 
blackwater  fever.  The  colour  of  the  urine  was  light  yellow  or  amber. 
Case 
Period  of 
suppression 
j 
1  Average  amount  of 
— 
■  urine  daily  during 
suppression 
Sp.  gr.  of  \irlnc 
Coagulable  proteid 
in  urine 
7a 
Nine  days 
28  c.c. 
r*oro  lo  1*015 
,[  col.  to  J  col. 
1  T 
Six  days 
66  c.c. 
I  *008  to  1*009 
^  col.  to  ^  col. 
(on  fourth  and  fifth  days) 
The  urine  was  pale  yellow  or  amber  in  colour,  and  was  of  markedly 
low  specific  gravity,  namely,  roio  to  roi5  in  the  first  case  and 
I  008  to  I  009  in  the  second  case.  Unfortunately,  no  estimation  of 
the  amount  of  urea  present  could  be  made.  Another  striking  feature 
of  the  urine  was  the  large  amount  of  coagulated  proteid  which  it 
contained,  the  precipitate  produced  on  acidifying  and  boiling 
measuring,  on  standing,  l  col.  to  |  col.  of  the  urine  taken.  In 
Table  41,  together  with  the  above  two  cases,  in  which  death  occurred 
on  the  tenth  and  ninth  days  respectively,  another  case  is  also  recorded, 
because  the  question  arose  whether  this  case,  in  which  death  occurred 
on  the  ninth  day,  should  be  regarded  as  one  of  partial  suppression. 
The  average  daily  amount  of  urine  was  640  c.cm.  (22^  oz.),  and  its 
