II2 
epithelium,  had  been  detached  at  a  higher  level  and  was  found  partly 
fdling  a  duct  of  Bertini.  In  the  smaller  straight  tubules  similar  plugs 
of  lesser  dimensions,  from  30//  to  /\on  in  diameter,  were  frequently 
seen.  In  the  uriniferous  tubules  (Figs.  33,  35,  37,  39,  53  and  55)  j 
granular  plugs  or  casts  were  sometimes  present,  frequently  absent  i 
r- 
0/. 
T 
JIOJJ. 
I 
300 fX 
Fig,  37.  Section  of  cortex  of  kidney  during  .suppression  of  urine,  five 
days  after  haernoglobinuria  had  ceased.  Hlackwater  Fever,  Case  ii. 
The  renal  tubules  are  generally  dilated  to  a  considerable  degree,  the 
epithelium  being  in  many  places  correspondingly  thinned.  Tn  thirteen 
of  the  tubules  dense  black  material  is  seen  partly  filling  the  lumen. 
In  two  situations  this  material  is  observed  to  consist  of  more  or  less 
discrete  granules,  while  elsewhere  the  individual  granules  are 
indistinct.  A  small  amount  of  flocculent  material,  with  here  and 
there  a  nucleus,  can  be  recognised  in  some  of  the  tubules.  Tn  one 
tubule  the  epithelium  has  disappeared  from  part  of  the  wall  of  the 
tubule.  The  renal  epithelium  does  not  appear  to  be  degenerated. 
'I'he  interstitial  tissue  is  distended  with  fluid,  but  does  not  exhibit 
any  cell  infiltration.  The  blood  vessels  are  not  congested.  Few  red 
cells  are  seen.  No  malarial  pigment  is  recogni.sable.  Hardened  in 
alcohol.  Stained  with  iron  alum  haematoxylin.  x  150. 
[ 
