lOI 
ranging  between  3  and  25  rarely  more.  The  casts  were  brown 
in  colour,  the  depth  of  colour  depending  upon  the  sparsity  or 
abundance  of  the  granules  present.  When  the  casts  contained  very 
few  granules  their  hyaline  matrix  became  visible  (Figs.  25,  26).  Some¬ 
times  the  granules  were  scattered  irregularly  and  in  small  numbers 
(Figs.  25,  28,  31),  sometimes  very  densely  throughout  the  casts 
(Fig.  30).  The  granules  were  sometimes  very  fine,  not  more  than 
0-5  /u  in  diameter  (Figs.  25,  28),  sometimes  very  coarse,  reaching  4  4 
in  diameter  (Fig.  29) ;  intermediate  forms  were  common  (Figs.  26,  30). 
•W' 
W 
c..  ■*  .f:, 
■'C 
# 
0  fi  100  fj  200  fM. 
Fig.  30.  Deposit  from  porter-coloured  urine  of  Case  15  (third  day), 
stained  with  a  watery  solution  of  methylenblue.  The  deposit 
consists  of  granular  casts  and  masses,  in  some  of  which  nuclei  of 
renal  origin  are  seen.  The  granules  are  mostly  fine,  but  some  coarse 
granules  are  seen.  A  few  free  renal  cells  are  also  present. 
Magnification  i8o  diameters. 
The  colour  was  brown,  the  largest  granules  being  the  darkest ;  but 
occasionally  variation  in  the  depth  of  colour  was  met  with  irrespective 
of  size.  Masses  of  granules  were  also  met  with,  some  obviously 
representing  broken-down  casts,  as  well  as  free  granules  (Fig.  29),  as 
in  haemoglobinuria  of  the  rabbit.  The  consistence  of  the  granular 
casts  varied  considerably,  some  being  hard  and  dry  (Figs.  27,  28,  30), 
