related  to  the  percentage  of  haemoglobin  in  the  urine,  being  most 
abundant  when  the  latter  was  highest,  but  further  experiments  are 
required  to  settle  this  point  definitely.  The  deposit  from  the  urine 
on  centrifugalisation  was  alwa3^s  dark  in  colour,  sometimes  of  a  dark 
chocolate  colour,  sometimes  of  a  greenish-black  colour.  Red  cells 
were  not  met  with.  'I'he  dejiosit  diminished  in  amount  as  the  haenio- 
globinuria  lessened,  but  was  still  present  for  about  a  day  after  the 
haemoglobinuria  had  ended. 
HI 
o  .. , 
‘he 
“I. 
J 
(r 
I ' 
V 
>00^  »«0  ^ 
I'lG.  25.  To  left,  deposit  from  chocolate-coloured  urine  of  Ca.se  2  (second 
day),  consisting  (in  addition  to  pus  cells  and  bacteria,  not  sketched) 
of  red  cells,  more  or  less  decolourised,  together  with  a  few  granular 
casts.  To  right,  deposit  from  dark  amber-coloured  urine  of  Case  s 
(fifth  day),  consisting  of  hyaline  ca.sts,  in  which  a  few  indistinct 
nuclei  can  be  seen.  Magnification  180  diameters. 
.Similar  casts  and  free  epithelial  cells  were  also  found  in  the 
chocolate  coloured  deposit  of  ihe  urine  during  redwater  in  cattle  ami 
dogs,  due  to  piroplasmosis. 
Ihe  urine  in  the  twenty  attacks  of  Ijlackwater  fever  studied, 
contained,  in  all  cases  ni  which  this  point  was  determined,  that  is  in 
all  except  Cases  i  and  12,  Table  40,  solid  matter  chiefly  made  up  of 
granular  casts  and  granular  debris,  similar  in  appearance  to  that 
already  described  in  experimental  haemoglobinuria  in  rabbits  When 
unmixed  with  the  crystalline  and  amorphous  deposits  formed  in  urine 
which  has  stood  for  some  time,  the  suspended  matter  was  found  on 
centrifugalisation  to  be  of  a  chocolate-brown  colour.  As  in  experi 
mental  haemoglobinuria,  it  varied  considerably  in  amount  in  different 
cases,  being  sometimes  scanty,  sometimes  when  allowed  to  sediment 
